- #!perl -p 
- s/./ord$&/sge;while($_){/.$/;$s=$&%2 .$s;$t=$v="";$t.=$v+$_/2|0,$v=$_%2*5 
- for/./- g ;s/^0// if$_=$t}$_=$s;s/(.)(.)?/([- A ,- C ],[- G ,- T ])[$1][$2]/ge
 
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