if \1 <letter \1> : "\1" else if \2 <letter \2> : "\2" end if end if # (if (@ 1 0-2) ‘\1’ # (.inner # (map (@ 2 2-2) # (.sequence # (keys (@ 2 2-13) ‘<letter \1>’) # ) # (.result # (string (@ 2 16-20) ‘"\1"’) # ) # ) # ) # (.otherwise # (if (@ 4 2-4) ‘\2’ # (.inner # (map (@ 5 4-4) # (.sequence # (keys (@ 5 4-15) ‘<letter \2>’) # ) # (.result # (string (@ 5 18-22) ‘"\2"’) # ) # ) # ) # (.otherwise nil) # ) # ) # )