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if \1 if \2 <letter \1> : "\2" end if end if # (if (@ 1 0-2) ‘\1’ # (.inner # (if (@ 2 2-4) ‘\1’ # (.inner # (map (@ 3 4-4) # (.sequence # (keys (@ 3 4-15) ‘<letter \1>’) # ) # (.result # (string (@ 3 18-22) ‘"\2"’) # ) # ) # ) # (.otherwise nil) # ) # ) # (.otherwise nil) # )