TheCodeBreakers
common letters of that language. They memorized them by the rather
ominous phrase "a sin to er(r)." However, the sequence of those letters
played no part in the construction of the key alphabet.
For that construction, a keyword was selected. Clausen used
SUBWAY. The encipherer wrote this out, followed by the rest of the
alphabet in rows beneath it, with a full stop and a letter-number switch
sign at the end. Then the digits 0 to 7 were assigned to ASINTOER as
they oc-
curred vertically in columns from left to right. Finally the two-digit
groups from 80 to 99 were assigned to the remaining letters and
symbols, also vertically:
u B w A
8 8 9 5
2 7 1 7
D E F G
8 3 9 9
0 3 2 5 8
3 K L M
8 8 9 9
4 8 3 6
annaabi.ee 
