Station X August 21, 1941
Mr Crum
We have just
intercepted a message from Berlin.
We know the internal key. You have the mission to
find the message key.
Major Tester
QWEP9QWEP9QWEP9
CAESAR9ANTON9MARTHA9PAULA9IDA9NORDPOL9GUSTAV9PAULA
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GQM8K
CHI1
...xxxx....xx....x.xx..x..xx.x.xx.x.xxxx.
CHI2
xx..xxx.xx...x.x.xx...xx...x...
CHI3
..xxx.xx..x....xxx..xx.xx.xx.
CHI4
..xx..x.xx..x..xx..x..xxxx
CHI5
.x...x.xx..x...xxx.xxx.
MU61
xxxx..xxxx.xxxx....xxx...xx..xxxx.xxx.xx.xxxx.xxxx.xxxx.xxxx.
MU37
x.x...xxx.xxx..x.x.x.x.x.xx.xxx..x.x.
PSI1
..x.x.x.x.x..x..x.xx.xx.x.x..xx.xxx..xxx...
PSI2
..x.xx.x.x.x.x.x.xx..xx.x..x.xxxx.....xxx..x.xx
PSI3
x.x.x.x.x.x.x..x..xx.x.x.xxxx....xxx...xxx.xx..x..x
PSI4
x.x..xx.x.x.x.x.x.xx.x....xx..xx..xx.xxxxx.x..x....x.
PSI5
.x.x.x.x.xx...x.x..xxx.xxxx.xx.x....x...x..xx.xx..xx..x.x.x