MAYBE Problem: b(a(b(b(b(a(b(b(x1)))))))) -> b(b(b(a(b(a(b(b(b(a(b(x1))))))))))) Proof: Complexity Transformation Processor: strict: b(a(b(b(b(a(b(b(x1)))))))) -> b(b(b(a(b(a(b(b(b(a(b(x1))))))))))) weak: Open