(STRATEGY INNERMOST) (VAR x y) (DATATYPES A = µX.< h(X) >) (SIGNATURES f :: [A x A] -> A g :: [A x A] -> A) (RULES f(x,y) -> g(x,y) g(h(x),y) -> h(f(x,y)) g(h(x),y) -> h(g(x,y)))