YES TRS: f(c(X,s(Y))) -> f(c(s(X),Y)) g(c(s(X),Y)) -> f(c(X,s(Y))) max/plus interpretations on N: f_A(x1) = max{1, 5 + x1} f#_A(x1) = max{1, 1 + x1} c_A(x1,x2) = max{1, -2, -3 + x2} c#_A(x1,x2) = max{6, -3, -4} s_A(x1) = max{9, 5 + x1} s#_A(x1) = max{6, -5} g_A(x1) = max{0, 14 + x1} g#_A(x1) = max{0, 7 + x1} precedence: g > f > c > s