(VAR x y)
(RULES
   s(p(x)) -> x
   p(s(x)) -> x
   +(x,0) -> x
   +(x,s(y)) -> s(+(x,y))
   +(x,p(y)) -> p(+(x,y))
   +(0,y) -> y
   +(p(x),y) -> p(+(x,y))
   +(s(x),y) -> s(+(x,y))
)
(COMMENT
experiments for [36]
submitted by: Takahito Aoto
)