Below is the A2Z52 encoder/decoder. A2Z52 is a simple clone of the A1Z26 substitution cipher, where each number is doubled. Thus it contains only even numbers.
Here all letters are set to lowercase, the English alphabet is used, and all non-alphabet symbols are not transformed. In decoding, all numbers (even numbers from 2 to 52) should be separated by any non-digit symbol (dash, space).
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