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YNTDAE
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Work In Progress.
YNTDAE (You Need To Describe An Esolang) is an esoteric programming language.
Syntax
a: b b b b b b b b -> c c c c c c c c, d d d d d d d d -> e e e e e e e e; f: g g g g g g g g -> h h h h h h h h;
Wildcards are * and are only allowed on the first tape of the tape pair. Use # for one-line comments.
The input is the first tape in the tape pair.
It changes to the second tape in the tape pair.
Other characters output the tape.