ref Sym 'x' line 1: not found
ref Sym 'y' line 1: not found
ref Sym 'z' line 1: not found
ref Sym 'zz' line 1: not found
33 states 20 scans 14 shifts 15 reductions 0 compares 0 ambiguities
(( if  (  x  ) ( if  (  y  ) ( if  (  z  )  zz ))) ; )