(VAR x y )
(STRATEGY INNERMOST)
(RULES 
        min(0,y) -> 0
        min(x,0) -> 0
        min(s(x),s(y)) -> s(min(x,y))
        max(0,y) -> y
        max(x,0) -> x
        max(s(x),s(y)) -> s(max(x,y))
        +(0,y) -> y
        +(s(x),y) -> s(+(x,y))
        -(x,0) -> x
        -(s(x),s(y)) -> -(x,y)
        *(x,0) -> 0
        *(x,s(y)) -> +(x,*(x,y))
        f(s(x)) -> f(-(max(*(s(x),s(x)),+(s(x),s(s(s(0))))),max(s(*(s(x),s(x))),+(s(x),s(s(s(s(0))))))))
        
)