(GOAL COMPLEXITY) (STARTTERM (FUNCTIONSYMBOLS l0)) (VAR A B) (RULES l0(A,B) -> Com_1(l1(A,B)) l1(A,B) -> Com_1(l1(A - 1,B + A)) :|: A >= 1 l1(A,B) -> Com_1(l2(A,B)) :|: 0 >= A l2(A,B) -> Com_1(l2(A,B - 1)) :|: B >= 1 )