We consider the following Problem: Strict Trs: {a(b(x)) -> b(b(a(x)))} StartTerms: basic terms Strategy: innermost Certificate: YES(?,O(n^1)) Proof: We consider the following Problem: Strict Trs: {a(b(x)) -> b(b(a(x)))} StartTerms: basic terms Strategy: innermost Certificate: YES(?,O(n^1)) Proof: We consider the following Problem: Strict Trs: {a(b(x)) -> b(b(a(x)))} StartTerms: basic terms Strategy: innermost Certificate: YES(?,O(n^1)) Proof: The problem is match-bounded by 1. The enriched problem is compatible with the following automaton: { a_0(2) -> 1 , a_1(2) -> 4 , b_0(2) -> 2 , b_1(3) -> 1 , b_1(3) -> 4 , b_1(4) -> 3} Hurray, we answered YES(?,O(n^1))