This section would be cool if it had a negative option and stuff like,
hydrophobics use Z.
It sorts with a 2x penalty for stop and give precence to more equal distributions,
in case of a tie to less degenerate codons.
Accepts three letter code with first letter capital separated by a space,
or one letter with spaces or not — corner case: SER is Ser + Asp
+ Arg while Ser is Serine.
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