without error.

PERFORMANCE MEASURES:

Write a message using a single transposition cipher in $5$ minutes without error.

a$.$ Write the first $10-$letter memory word$($s$)$ or phrase across the paper.

NOTE: Leave enough space between the letters of the memory word to avoid confusion when writing the clear text message underneath.

b$.$ Write the message underneath the $10$ letters; place the wo eleventh letter of the message under the first letter of the message and continue writing on a letter$-$by$-$letter basis until the message is complete. Put XXs at the ends of sentences and end of message to insure to each letter of memory phrase has an equal number of letters underneath.

c$.$ Alphabetize the first $10-$letter memory word$($s$)$ or phrase. Put small numbers above each letter. For example A is $1,$ B is $2,$ C is $3,2$ is $10.$

d$.$ Draw lines vertically separating the $10-$letter memory word$($s$)/$phrase$.$ Extend these lines down the page until the bottom line of the message is reached.

e$.$ Go to column number $1$ and write down the first five letters in that column forming a $5-$letter group.

f$.$ If the letters in colum $1$ do not make a $5-$letter group, go on to column $2,$ and finish the group. $($Always start at the top of the colum and work down$).$

$2-145$