MAYBE MAYBE TRS: { b(c(x)) -> c(b(b(x))), b(v(x)) -> x, a(b(x)) -> b(a(a(x))), a(u(x)) -> x, c(a(x)) -> a(c(c(x))), c(w(x)) -> x, u(a(x)) -> x, v(b(x)) -> x, w(c(x)) -> x } DUP: We consider a non-duplicating system. Trs: { b(c(x)) -> c(b(b(x))), b(v(x)) -> x, a(b(x)) -> b(a(a(x))), a(u(x)) -> x, c(a(x)) -> a(c(c(x))), c(w(x)) -> x, u(a(x)) -> x, v(b(x)) -> x, w(c(x)) -> x } Fail