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sub f {
  my@r=qw(UA[AG]|UGA GC. - UG[UC] GA[UC] GA[AG] UU[UC] GG. CA[UC] AU[^
+G] - AA[AG] CU.|UU[AG]
  AUG AA[UC] - CC. CA[AG] CG.|AG[AG] UC.|AG[UC] AC. - GU. UGG - UA[UC]
+);
  ((my$t=pop)=~s|...|chr 64+(grep$&=~/$r[$_]/,0..25)[0]|eg);$t=~y/@/./
+;$t
}

sub f {
  my@r=qw(UA[AG]|UGA GC. - UG[UC] GA[UC] GA[AG] UU[UC] GG. CA[UC] AU[^
+G] - AA[AG] CU.|UU[AG] AUG AA[UC] - CC. CA[AG] CG.|AG[AG] UC.|AG[UC] 
+AC. - GU. UGG - UA[UC] ^);
  ((my$t=pop)=~s|..?.?|chr 64+(grep$&=~/$r[$_]/,0..26)[0]|eg);$t=~y/@Z
+/./d;$t
}