parameter (pair (list int) (list int));
return (list int);
storage unit;
code { CAR; DUP; DIP{CDR}; CAR; # Unpack lists
       NIL int; SWAP;           # Setup reverse accumulator
       LAMBDA (pair int (list int))
              (list int)
              {DUP; CAR; DIP{CDR}; CONS};
       REDUCE;                  # Reverse list
       LAMBDA (pair int (list int))
              (list int)
              {DUP; CAR; DIP{CDR}; CONS};
       REDUCE;                  # Append reversed list
       UNIT; SWAP; PAIR}        # Calling convention