198.40/50.72	MAYBE
198.40/50.72	
198.40/50.72	Problem:
198.40/50.72	 b(b(b(a(x1)))) -> b(b(a(a(x1))))
198.40/50.72	 b(a(b(a(x1)))) -> b(a(b(b(x1))))
198.40/50.72	 b(a(a(a(x1)))) -> a(a(a(b(x1))))
198.40/50.72	
198.40/50.72	Proof:
198.40/50.72	 Open
198.40/50.73	EOF