(GOAL COMPLEXITY) (STARTTERM CONSTRUCTOR-BASED) (STRATEGY INNERMOST) (STRATEGY INNERMOST) (VAR x y) (DATATYPES A = µX.< a(X), b(X) >) (SIGNATURES f :: [A x A] -> A) (RULES f(x,a(a(b(b(y))))) -> f(a(a(a(b(b(b(x)))))),y) f(a(x),y) -> f(x,a(y)) f(b(x),y) -> f(x,b(y)))