MAYBE MAYBE TRS: { g(g(x)) -> g(h(g(x))), g(h(g(x))) -> g(x), h(h(x)) -> h(f(h(x), x))} DUP: We consider a duplicating system. Trs: { g(g(x)) -> g(h(g(x))), g(h(g(x))) -> g(x), h(h(x)) -> h(f(h(x), x))} Fail