YES We show the termination of the TRS R: f(|1|()) -> f(g(|1|())) f(f(x)) -> f(x) g(|0|()) -> g(f(|0|())) g(g(x)) -> g(x) -- SCC decomposition. Consider the dependency pair problem (P, R), where P consists of p1: f#(|1|()) -> f#(g(|1|())) p2: f#(|1|()) -> g#(|1|()) p3: g#(|0|()) -> g#(f(|0|())) p4: g#(|0|()) -> f#(|0|()) and R consists of: r1: f(|1|()) -> f(g(|1|())) r2: f(f(x)) -> f(x) r3: g(|0|()) -> g(f(|0|())) r4: g(g(x)) -> g(x) The estimated dependency graph contains the following SCCs: (no SCCs)