Texas Instruments Calculator TI 73 User Manual

Getting Started  
with the  
TI-73 Explorer™,  
CBL 2™, and CBR™  
CL3456  
Contents  
Turning on and turning off the TI-73 Explorer™ ............................... 5  
Changing mode settings ................................................................. 23  
Creating lists and statistical plots .................................................... 24  
Graphing a line ................................................................................ 27  
Error messages ............................................................................... 28  
MEMORY menu - Ÿ ............................................................... 30  
Installing handheld software applications ....................................... 33  
Running software applications ........................................................ 35  
Collecting data using the CBL™/CBR™ App ................................. 36  
Collecting data using the CBL 2é ................................................... 37  
© 2003 Texas Instruments Incorporated.  
 
TI-73 Explorer  
keys  
$ " # !  
Let you move the  
cursor in four  
directions on the  
screen.  
-
Accesses the  
secondary  
functions of keys  
(shown in yellow  
above keys).  
:
Erases entries and  
answers on the  
Home screen and  
entry line.  
9
Lists the applications  
installed on your  
TI-73 Explorer.  
b
Evaluates an  
expression, executes  
an instruction, and  
selects a menu item.  
^
Turns on the TI-73  
Explorer.  
4
© 2003 Texas Instruments Incorporated.  
 
Turning on and turning off the TI-73Explorer  
To turn on the TI-73 Explorer, press ^ located at the lower left  
corner of the device.  
To turn off the TI-73 Explorer, press -, and then the ^ key. The  
next time you turn on the TI-73 Explorer, the Home screen appears  
with the same settings and memory contents retained.  
Automatic Power Down™  
The Automatic Power Down™ (APD™) feature prolongs battery life by  
turning off the TI-73 Explorer automatically after five inactive minutes.  
When you turn on following APD, the handheld device displays the same  
information displayed before APD, retaining the same cursor position,  
settings, memory contents, and any error conditions.  
Note: Avoid depleting your batteries by turning off your TI-73 Explorer  
when not in use.  
Adjusting the display contrast  
Display brightness and contrast depend on factors such as room lighting,  
battery freshness, and viewing angle. To adjust the contrast:  
1. Press and release -.  
2. To darken the screen, press and hold $.  
— or —  
To lighten the screen, press and hold #.  
Note: The flashing cursor (Ù) changes to Û when you press the - key.  
As you adjust the setting, a number from 0 (lightest) to 9 (darkest)  
appears at the upper right corner of the screen.  
Note: If the contrast setting is too light or dark, the number will not be  
viewable.  
© 2003 Texas Instruments Incorporated.  
5
   
Home screen  
The first time you turn on your TI-73 Explorer™, this screen appears:  
Operating system  
version  
Note: Download the latest operating system (OS) to your Internet-  
enabled computer using the TI-Connectivity Kit. Both the latest OS and TI  
Connectivity Kit are available at education.ti.com/shop.  
To clear the screen, press : twice. A blank screen with a flashing  
cursor appears called the Home screen. You can use the Home screen to  
enter problems and view results.  
Home screen  
Note: If you press : and do not see a blank Home screen, first press  
-, and then press . to select l.  
Example: Add 2 + 3 on the Home screen.  
Press  
Result  
2 \ 3  
b
6
© 2003 Texas Instruments Incorporated.  
 
Example: Multiply 5 x 4.  
Press  
Result  
5 M 4  
b
Entering secondary functions -  
Secondary functions are printed in yellow above the keys. To select a  
secondary function, first press the yellow - key, and then press a key  
with a secondary function.  
For example, to view the CATALOG menu, press - |.  
Note: The flashing cursor (Ù) changes to Û when you press the - key.  
© 2003 Texas Instruments Incorporated.  
7
Entering text - t  
You can use the Text Editor to key in text, such as alphabetic characters,  
braces, quotation marks, spaces, and relations.  
To access the Text Editor, press - t.  
To return to the Home screen from the Text Editor:  
Select Done in the Text Editor and press b.  
— or —  
To cancel the operation, press - l.  
Example: Insert R on the Home screen.  
Press  
Result  
- t R b  
Note: To select R, press !,  
", # and $ as needed. R is  
pasted to the entry line.  
# # #  
(to select Done)  
b
8
© 2003 Texas Instruments Incorporated.  
 
Clear  
:
and Quit - l  
Clear :  
The : key is located just below the four cursor keys at the upper  
right corner of the keyboard.  
Pressing : while entering information clears the entry line.  
Pressing : when the cursor is on a blank line clears the Home  
screen.  
Note: Although it does not affect calculations, consider clearing the  
Home screen before beginning a new problem. We recommend that you  
press : each time you begin a new example in this guide to ensure  
that the screen you see matches the one in the example.  
Quit - l  
If you want to return to the Home screen after pressing a menu key, press  
- l.  
Note: To return to the Home screen and clear it, press - l :.  
© 2003 Texas Instruments Incorporated.  
9
 
Using subtraction  
T
and negation  
a
keys  
Use T to enter subtraction operations.  
Use a to enter a negative number in an operation, expression, or on  
a setup screen.  
Note: The TI-73 Explorer™ subtraction and negation symbols appear  
slightly different to make them easier to distinguish. The negative  
symbol is raised and slightly shorter.  
Example: Subtract 10 from 25.  
Press  
Result  
Result  
Result  
2 5 T 1 0  
b
Example: Subtract L10 from 25.  
Press  
2 5 T a 1 0  
b
Example: Subtract L5 from 25.  
Press  
2 5 T T 5  
b
Note: If you use the  
subtraction key instead of  
the negation key, an error  
message will appear. (See  
“Error messages” on  
page 28.)  
10  
© 2003 Texas Instruments Incorporated.  
 
Keyboard math applications  
Example: Add L456 + 123.  
Press  
Result  
Result  
Result  
a 4 5 6 \ 1 2 3  
b
Example: Divide 45.68 P 123.  
Press  
4 5 ` 6 8 F 1 2 3  
b
Example: Multiply 28 Q 1.5.  
Press  
2 8 M 1 . 5 b  
© 2003 Texas Instruments Incorporated.  
11  
 
Integer division - Œ  
- Œ divides two positive integers and displays the quotient and  
remainder (r).  
Example: Calculate 11 P 2 using integer division.  
Press  
Result  
1 1 - Œ 2  
b
Note: The answer is 5 with a  
remainder of 1.  
Percent  
C
Example: Convert 75% to a decimal.  
Press  
Result  
7 5 C  
b
12  
© 2003 Texas Instruments Incorporated.  
   
Square  
6
2
Example: Calculate 5 .  
Press  
Result  
5 6  
b
2
2
Example: Compare the results of L5 and (L5) .  
Press  
Result  
a 5 6  
b
D a 5 E 6  
b
© 2003 Texas Instruments Incorporated.  
13  
 
Square root - z  
Example: Calculate 256 .  
Press  
Result  
- z 2 5 6 E  
b
Pi - „  
The TI-73 Explorer™ displays p = 3.141592654 but uses 3.1415926535898  
in calculations.  
Example: Multiply 4 Q p.  
Press  
Result  
4 M - „  
b
14  
© 2003 Texas Instruments Incorporated.  
   
Fractions  
This example shows the stacked fraction and manual simplification  
features of the TI-73 Explorer™. (See Chapter 3 of the TI-73 Explorer  
Software Graphing Calculator Guidebook.)  
Example: Add 1 3/4 + 2 4/8 and manually simplify the result.  
Press  
Result  
.
# # # # "  
b - l  
(to select Mansimp)  
1 < 3 = 4 " \  
2 < 4 = 8 b  
Note: The arrow on the  
screen indicates that the  
answer can be simplified.  
? b  
(optional step to convert  
mixed fraction to simple  
fraction)  
B b  
(to simplify the result)  
© 2003 Texas Instruments Incorporated.  
15  
 
Choosing the simplification factor  
Example: Add 4/16 + 8/16 and choose the simplification factor to reduce  
the sum to lowest terms.  
Press  
Result  
- l :  
4 = 1 6 " \ 8 =  
1 6 b  
B 2 b  
B 3 b  
Because the result did  
not change, try another  
factor.  
B 2 b  
Simplification is  
complete.  
16  
© 2003 Texas Instruments Incorporated.  
Constants with counter-creating number patterns  
The TI-73 Explorer™ Constant feature makes it easy to create number  
patterns. Watch the pattern in the example below take shape on the  
Home screen.  
Example: Set up a SINGLE counter, define a constant (+5), and create a  
number pattern.  
Press  
Result  
y †  
} (if necessary)  
b
\ 5  
- l :  
0 @  
(Press @ repeatedly until  
you reach 30.)  
© 2003 Texas Instruments Incorporated.  
17  
 
Scrolling on the Home screen  
The TI-73 Explorer™ scrolling feature helps make number investigation  
easy by providing a copy and paste functionality.  
Example: Sum the second (5 + 5) and fifth (20 + 5) terms of the number  
pattern created in the previous example. (See “Constants with counter-  
creating number patterns” on page 17.)  
Press  
Result  
Press } repeatedly to  
select the second term  
(n=2).  
b
\
Press } repeatedly to  
select the fifth term  
(n=5).  
b b  
18  
© 2003 Texas Instruments Incorporated.  
 
Using parentheses D E  
Example: Multiply 4 * 1 + 2 and 4 * (1 + 2).  
Press  
Result  
4 M 1 \ 2  
b
4 M D 1 \ 2 E  
b
Example: Divide 1/2 P 2/3 (not using stacked fraction capability).  
Press  
Result  
D 1 F 2 E F  
D 2 F 3 E  
b
1
--  
Example: Calculate 16 ^  
.
2
Press  
Result  
1 6 7 D 1 F2 E  
b
Note: Try each of the examples above without the parentheses and see  
what happens!  
© 2003 Texas Instruments Incorporated.  
19  
 
TI-73 Explorer  
menus  
You use a menu to enter most TI-73 Explorer functions and instructions  
on the Home screen.  
To select an item from a displayed menu:  
Press the number or letter displayed to the left of the item.  
— or —  
Use the cursor keys (or }) to select the item, and then press Í.  
Some menus close automatically when you make a selection. If a menu  
remains open, press y 5 to exit.  
Example: Find the gcd(12, 14) = 2.  
Press  
Result  

2
— or —  
† Í  
1 2 , 1 4 ¤  
Í
20  
© 2003 Texas Instruments Incorporated.  
 
Selected TI-73 Explorermenus  
To select  
Description  
Press  
Mode menu  
Lists commands that let you control how  
numbers are displayed and interpreted  
.
MATH menu  
DRAW menu  
Lists math functions, including number,  
probability, and logic  

Lists graph and plot drawing tools  
Lets you store pictures in memory  
2
List Editor  
Lets you enter numerical and text, or  
3
categorical, lists  
Program menu Lists stored programs and programming  
commands and instructions  
8
Œ
APPLICATIONS Lists the Apps installed on your TI-73  
menu  
Explorer  
Text Editor  
Lets you enter text, such as alphabetic  
characters, braces, test operators,  
quotation mark, space  
y t  
Trigonometry  
menu  
Lists trigonometric functions and angle y u  
unit options  
Statistics menu Lets you open and edit lists and calculate y v  
statistical analysis on lists  
MEMORY  
menu  
Lets you manage TI-73 Explorer memory y L  
VARS menu  
Lists variable names you can paste to the y }  
entry line  
CATALOG  
menu  
Lists all built-in functions and  
instructions  
y N  
TI-73 Explorer graphing menus  
To select  
Description  
Press  
WINDOW  
menu  
Lists domain and range options for the  
graphing window  
'
ZOOM menu  
PLOT menu  
Lists preset window settings to select  
Lists options that let you set up a plot  
(
y e  
© 2003 Texas Instruments Incorporated.  
21  
To select  
Description  
Press  
TABLE SETUP  
menu  
Lists options specifying table settings  
y f  
Window  
Lets you choose display settings for  
y g  
format menu  
function graphing and statistical plotting  
22  
© 2003 Texas Instruments Incorporated.  
Changing mode settings  
Use mode settings to specify how the TI-73 Explorer™ interprets entries  
and displays answers.  
Example: Change the mode setting for decimals from Float to 3 decimal  
places.  
Press  
Result  
.
# " " " "  
b
- l  
1 ` 2 3 4 5 6  
b
Note: Rounds to three  
decimal places.  
Note: You must highlight a mode setting and press Í to change it.  
Mode settings  
Mode  
Description  
Display  
Normal Sci  
Numeric Notation Displays answers in normal  
or scientific notation  
Float 0123456789  
Degree Radian  
Decimal Notation Displays answers in fixed-  
or floating-decimal point  
Angle  
Displays angle values in  
degrees or radians  
Display Format  
(fractions only)  
Displays fractions in mixed A§b/c b/c  
or simple format  
Autosimp Mansimp  
Simplification  
(fractions only)  
Lets you simplify fractions  
automatically or manually  
© 2003 Texas Instruments Incorporated.  
23  
 
Creating lists and statistical plots  
To create categorical and number lists:  
1. Use the List Editor to enter the categorical and numerical lists.  
2. Use the PLOT menu to plot the lists.  
Example: Enter a categorical list in L made up of list elements BLUE,  
1
RED, and GREEN, enter a number list in L , and plot a pie chart.  
2
Press  
Result  
3
- t  
Note: Press the cursor keys  
to highlight characters in  
the Text Editor.  
b B b L b  
U b E b b  
Done  
Note: To define categorical  
lists, enclose the first list  
element in quotation marks.  
b b  
Note: The lowercase c next  
to L signifies the list is  
1
defined as categorical.  
Repeat steps for RED and  
GREEN.  
Note: You do not have to  
use quotation marks after  
the first list element.  
24  
© 2003 Texas Instruments Incorporated.  
 
Press  
Result  
"
(to move cursor to L2)  
1 5 b 2 5 b 1 0 b  
Note: The mode setting for  
decimals in this example is  
set to Float. (See “Changing  
mode settings” on page 23.)  
- e  
b
! b  
(to enter statistical plot  
setup screen and turn Plot 1  
on)  
# " " " "  
b
(to select the pie chart)  
© 2003 Texas Instruments Incorporated.  
25  
Press  
Result  
# # # "  
b
(to display numbers on the  
pie chart as percentages)  
* )  
Note: Press y 5 to return to the Home screen.  
26  
© 2003 Texas Instruments Incorporated.  
Graphing a line  
To graph a line:  
1. Display the Y= Editor.  
2. Enter the line.  
3. Display the graph.  
(See the TI-73 Explorer™ Software Graphing Calculator Guidebook for  
more detailed information.)  
Example: Graph the line Y = 2x + 1.  
Press  
Result  
& : 2 I + 1  
Note: The Y1 equal sign  
highlights when you enter a  
character. If another plot or  
function is highlighted,  
select it and press b to  
remove the highlight.  
(
# # # #  
# # #  
(to select ZDecimal and set  
up x and y values on graph)  
Note: The arrow next to  
ZDecimal indicates that you  
can press # or $ to display  
additional commands.  
b
)
Note: TRACE lets you use the  
cursor keys to trace to points  
to see coordinates on the  
line.  
© 2003 Texas Instruments Incorporated.  
27  
 
Error messages  
The TI-73 Explorer™ displays an error message whenever an error occurs.  
Example: Generate an error by entering the least common multiple  
function lcm( followed by only one number.  
Press  
Result  
- l :  
1 b  
2 7 ¡  
(to select lcm()  
Í
To return to the Home screen with the cursor on a new entry line,  
select 1:Quit.  
To correct the error, select 2:Goto. The TI-73 Explorer returns to the  
original entry line with the cursor flashing at the location of the  
error.  
(See Appendix B of the TI-73 Explorer Software Graphing Calculator  
Guidebook for a complete list of error conditions with explanations.)  
Sample error messages  
Error  
Description  
BREAK  
You pressed ^ to break a program execution, halt a  
DRAW instruction, or stop evaluation of an expression.  
DIM  
MISMATCH  
You attempted an operation that references more than  
one list with different dimensions (number of elements).  
DIVIDE BY 0  
You attempted to divide by 0.  
Note: Because The TI-73 Explorer allows undefined  
values on a graph, this error is not displayed during  
graphing.  
28  
© 2003 Texas Instruments Incorporated.  
 
Error  
Description  
DOMAIN  
You specified an argument to a function or instruction  
outside the valid range, such as using a negative  
frequency in box plots.  
Note: Because The TI-73 Explorer™ allows undefined  
values on a graph, this error is not displayed during  
graphing.  
ERROR IN  
XMIT  
The TI-73 Explorer was unable to transmit an item.  
Check to see that the cable is connected firmly to  
both units and that the receiving unit is in the  
receive mode.  
You pressed ^ to break during transmission.  
MODE  
You pressed B to simplify a fraction while in the  
Autosimp mode.  
SCALE  
The Pictograph scale is invalid and must be an integer  
between 1 and 99,999.  
STAT  
You attempted a stat calculation with inappropriate  
lists.  
STAT PLOT  
SYNTAX  
You attempted to display a graph while a stat plot with  
an undefined list is on.  
The command contains a syntax error. Look for  
misplaced functions, arguments, parentheses, or  
commas. (See the TI-73 Explorer Software Graphing  
Calculator Guidebook.)  
WINDOW  
RANGE  
A problem exists with the WINDOW variables.  
You defined XmaxXmin or Ymax  Ymin.  
Ensure that your window values are within the  
limits of the TI-73 Explorer.  
© 2003 Texas Instruments Incorporated.  
29  
MEMORY menu - Ÿ  
To display the list of commands used to manage TI-73 Explorer™  
memory, press - Ÿ to open the MEMORY menu.  
To select a command from the MEMORY menu, use the cursor keys to  
select it and press b.  
To exit the MEMORY menu or a command screen and display the Home  
screen, press either - l or :.  
(See Chapter 14 of the TI-73 Explorer Software Graphing Calculator  
Guidebook.)  
Example: Display and exit the About screen.  
Press  
Result  
- Ÿ  
b
(to display the About screen)  
: :  
Command Action  
1:About  
Displays TI-73 Explorer product information, such as the  
operating system version number and product ID.  
2:Check  
RAM  
Displays the amount of total available memory and the  
amount of usage for each variable type.  
30  
© 2003 Texas Instruments Incorporated.  
 
Command Action  
3:Check  
APPs  
Displays the amount of available App memory (up to eight  
spaces).  
4:Delete  
Displays a list of variables that you can delete to increase  
the amount of available RAM.  
5:Clear  
Home  
Clears the Home screen.  
6:ClrAllList  
7:Reset  
Clears all lists in memory.  
Displays the RESET menu, where you can reset all RAM and  
all defaults.  
3:Check APPs - Ÿ  
The 3:Check APPs command displays the Spaces Free screen, where you  
can view the memory available for Apps in terms of spaces. Apps spaces  
are used by preloaded Apps. The preloaded CBL™/CBR™ App uses one  
space.  
The screen also lists the Apps loaded on the TI-73 Explorer™ and the  
number of spaces each uses.  
Note: Because Apps do not use RAM, you cannot delete Apps by pressing  
- Ÿ 4:Delete 1:All. Instead, press - Ÿ 4:Delete 8:Apps to delete  
Apps.  
(See Chapter 13 of the TI-73 Explorer Software Graphing Calculator  
Guidebook for information on running Apps on the TI-73 Explorer.)  
Resetting memory and defaults  
Follow these steps to clear all memory and reset the TI-73 Explorer to  
factory settings:  
1. To display the MEMORY menu, press - Ÿ.  
© 2003 Texas Instruments Incorporated.  
31  
   
2. To display the RESET menu, press 7:Reset.  
3. To display the RESET RAM menu, press 1:All RAM.  
4. Press 2:Reset.  
5. Press : to display the Home screen.  
Note: When you reset the TI-73 Explorer™, the display contrast is also  
reset and might need to be adjusted. See “Adjusting the display  
contrast” on page 5.  
32  
© 2003 Texas Instruments Incorporated.  
Installing handheld software applications  
You can update the functionality of your TI-73 Explorer™ by installing  
handheld software applications (Apps). Installing Apps on your TI-73  
Explorer is similar to installing new software applications on your  
computer.  
After downloading an App to your computer, use TI Connect™ or  
TI-GRAPH LINK™ software and a TI Connectivity cable to install the App  
on your TI-73 Explorer. You can find the latest Apps and a TI Connectivity  
Note: Before downloading an App, ensure your TI-73 Explorer has  
enough memory available. (See “3:Check APPs - Ÿ” on page 31.) If  
not, consider saving an existing App to your computer and then deleting  
it from your handheld to increase the amount of free space available.  
Instructions for Windows® using TI Connect  
Desktop icon method  
1. Connect your computer and handheld device with the TI  
Connectivity cable.  
2. Turn on the handheld device and go to the Home screen.  
3. Select an App file to transfer to the handheld device.  
4. Drag the App file to the TI Connect desktop icon on the Windows  
desktop.  
5. A message advises you when installation is complete. Remove the TI  
Connectivity cable from the computer or device.  
DeviceExplorer method  
1. Connect your computer and handheld device with the TI  
Connectivity cable.  
2. Turn on the handheld device and go to the Home screen.  
3. Start the TI Connect software and click DeviceExplorer. The software  
automatically detects the type of connected TI device and displays  
the contents.  
4. On the DeviceExplorer icon toolbar, click the Windows Explorer  
icon.  
5. Locate an App file to transfer to the handheld device.  
6. Drag the App file to the TI Connect desktop icon on the Windows  
desktop.  
7. A message advises you when installation is complete. Remove the TI  
Connectivity cable from the computer or device.  
© 2003 Texas Instruments Incorporated.  
33  
 
Instructions for Macintosh® using TI Connect™  
1. Connect your computer and handheld device with the TI  
Connectivity cable.  
2. Turn on the handheld device and go to the Home screen.  
3. Start the TI Connect software and click Connection to connect with  
the handheld device.  
4. From the displayed list, select a device type and computer port.  
5. Click Connect. The device window appears.  
6. Locate an App file to transfer to the handheld device.  
7. Drag the App file anywhere in the device window.  
8. A message advises you when installation is complete. Remove the TI  
Connectivity cable from the computer or device.  
34  
© 2003 Texas Instruments Incorporated.  
Running software applications  
Example: Run the CBL™/CBR™ App on your TI-73 Explorer™.  
Press  
Result  
Œ
Press or $ as needed to  
run the CBL/CBR App.  
b
© 2003 Texas Instruments Incorporated.  
35  
 
Collecting data using the CBL  
/CBR™  
App  
Example: Run the RANGER program from the CBL/CBR App.  
Press  
Result  
To run the CBL/CBR App, see  
“Running software  
applications” on page 35  
Press any key.  
† † b  
(to run the RANGER  
program)  
b
b  
(to set defaults)  
Each menu item helps you quickly set up data collection using the CBR.  
Investigate on your own.  
36  
© 2003 Texas Instruments Incorporated.  
 
Collecting data using the CBL 2  
é
To use the CBL 2 data collection system for the first time and use the  
1. Insert batteries in the CBL 2.  
2. Connect the CBL 2 to the TI-73 Explorer™ using the unit-to-unit  
cable.  
Note: You can also use the cradle. (For instructions, see the diagram  
on the cradle, or see Getting Started With the CBL 2.)  
3. To delete the DataMate programs prior to installing the DataMate  
App, reset the memory on your TI-73 Explorer. (See “Resetting  
memory and defaults” on page 31.)  
Note: Before downloading the DataMate App, ensure that your  
TI-73 Explorer has at least 3 App spaces available. (See “3:Check APPs  
- Ÿ” on page 31.) If not, consider saving an existing App to your  
computer and then deleting it from your handheld to increase the  
amount of free space available.  
4. Put the TI-73 Explorer in Receive mode.  
a. Press Œ. Link is highlighted.  
b. Press b.  
c. Press " to select RECEIVE.  
d. Press b.  
5. Press TRANSFER on the CBL 2. The CBL 2 detects the type of handheld  
device connected and sends the specified version of the DataMate  
App.  
Note: The DataMate App controls the CBL 2 and its data collection.  
6. Plug in the stainless steel temperature sensor to CBL2 channel 1  
(CH1).  
7. Run the DataMate App.  
a. Press Œ.  
b. Press or $ to select DATAMATE, and then press b.  
The DataMate App automatically identifies the Stainless Steel  
Temperature sensor, loads its calibration factors, and displays the  
name of the sensor and temperature in degrees C. DataMate also  
loads a default temperature experiment.  
8. To start collecting data with the default experiment, hold the  
temperature sensor in your hand and press 2:START.  
© 2003 Texas Instruments Incorporated.  
37  
 
9. A real-time graph measuring temperature appears. After about 30  
seconds, press X to stop collecting data.  
You just successfully collected and plotted data.  
For other DataMate options (including other sensors, analysis, and data  
saving), see Getting Started With the CBL 2, or visit:  
38  
© 2003 Texas Instruments Incorporated.  

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