YES Problem: f(g(X)) -> g(f(f(X))) f(h(X)) -> h(g(X)) Proof: String Reversal Processor: g(f(X)) -> f(f(g(X))) h(f(X)) -> g(h(X)) Bounds Processor: bound: 0 enrichment: match automaton: final states: {5,1} transitions: g0(2) -> 3* g0(6) -> 5* f30() -> 2* f0(3) -> 4* f0(4) -> 1* h0(2) -> 6* 1 -> 3* 5 -> 6* problem: Qed