198.35/50.48	MAYBE
198.35/50.48	
198.35/50.48	Problem:
198.35/50.48	 a(b(a(a(x1)))) -> a(a(b(a(x1))))
198.35/50.48	 b(a(a(b(x1)))) -> b(b(b(b(x1))))
198.35/50.48	 b(a(a(b(x1)))) -> a(a(a(b(x1))))
198.35/50.48	 a(b(b(a(x1)))) -> b(a(a(b(x1))))
198.35/50.48	
198.35/50.48	Proof:
198.35/50.48	 Open
198.35/50.48	EOF