197.54/50.54	MAYBE
197.54/50.54	
197.54/50.54	Problem:
197.54/50.54	 b(a(b(b(x1)))) -> b(b(b(a(b(x1)))))
197.54/50.54	 b(a(a(b(b(x1))))) -> b(a(b(b(a(a(b(x1)))))))
197.54/50.54	 b(a(a(a(b(b(x1)))))) -> b(a(a(b(b(a(a(a(b(x1)))))))))
197.54/50.54	 b(a(a(a(a(b(b(x1))))))) -> b(a(a(a(b(b(a(a(a(a(b(x1)))))))))))
197.54/50.54	
197.54/50.54	Proof:
197.54/50.54	 Open
197.76/50.54	EOF