A=1, B=2, ... Z=26 is a fine code. Codes 27-99 (and 0) could be used for space, punctuation, escape codes to special characters, and common letter sequences.
Alternatively, straddling checkerboard (ESTONIA-R).
A=1, B=2, ... Z=26 is a fine code. Codes 27-99 (and 0) could be used for space, punctuation, escape codes to special characters, and common letter sequences.
Alternatively, straddling checkerboard (ESTONIA-R).
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