Now the message is complete save for the two recognition groups which enable the recipient to decipher the message. These are made up- in different ways - from the "code book group," the "fixed group," and the "message group."
The code book group is composed of the page number, line number, and word number of the key phrase. In this case, page 77, line 14, and word (from left) 4-77144.
The fixed group – 69696 - is given by the Centre and changed only on orders from the Centre.
The message group is, for the first recognition group, the fifth group of the message as enciphered so far, i.e., 43290; for the second recognition group, the message group is the fifth group from the end of the message as enciphered so far, i.e., 69482.
Now in each case the code book group, the fixed group, and the message group are added together. Thus:
These two totals are now inserted in the appropriate spaces in the already enciphered message and the final result reads as follows:
