YES TRS: :(:(:(:(C(),x),y),z),u) -> :(:(x,z),:(:(:(x,y),z),u)) max/plus interpretations on N: :_A(x1,x2) = max{2, 3, 1} :#_A(x1,x2) = max{0, -3, 0} C_A = 1 C#_A = 0 precedence: : = C