197.93/50.62	MAYBE
197.93/50.62	
197.93/50.62	Problem:
197.93/50.62	 a(b(a(b(x1)))) -> b(b(b(b(x1))))
197.93/50.62	 a(a(b(b(x1)))) -> a(a(a(b(x1))))
197.93/50.62	 b(a(b(a(x1)))) -> a(b(a(b(x1))))
197.93/50.62	
197.93/50.62	Proof:
197.93/50.62	 Open
197.93/50.63	EOF