S9 LIB  (bottles)            ==>  list
        (bottles tens ones)  ==>  list

Generate the lyrics of the "99 bottles of beer" song using only
DEFINE-SYNTAX/SYNTAX-RULES (and a little bit of arithmetics).

(bottles)  ==>  ((99 bottles of beer on the wall)
                 (99 bottles of beer)
                 (take one down and pass it around)
                 (98 bottles of beer on the wall)
                 ...
                 (0 bottles of beer on the wall)
                 (0 bottles of beer)
                 (go to the store buy some more)
                 (99 bottles of beer on the wall))
