EverCrack Multiliteral to Uniliteral Cipher Converter

The EverCrack Multiliteral to Uniliteral Cipher Converter works by parsing the
cipher text for digraphs [two letter combinations] and assigning each unique
digraph an incremental value [0, 1, 2, 3, ...] while assigning repetitive digraphs
the value of its corresponding unique digraph [the first instance].
After every digraph has been accounted for, each is merely replaced by an
alphabetic value [A-Z]. The conversion process is very simple because
the encryption process is very simple [and both, arbitrary so long as it is
consistent] - converting a uniliteral cipher into multiliteral form does very little
to increase the strength and / or complexity of a cipher.