198.23/50.67	MAYBE
198.23/50.67	
198.23/50.67	Problem:
198.23/50.67	 b(a(a(a(x1)))) -> b(b(a(b(x1))))
198.23/50.67	 b(b(b(a(x1)))) -> b(b(a(a(x1))))
198.23/50.67	 a(a(b(b(x1)))) -> a(a(a(a(x1))))
198.23/50.67	
198.23/50.67	Proof:
198.23/50.67	 Open
198.23/50.68	EOF