198.16/50.71	MAYBE
198.16/50.71	
198.16/50.71	Problem:
198.16/50.71	 a(a(a(b(x1)))) -> b(b(a(a(x1))))
198.16/50.71	 a(b(b(a(x1)))) -> a(b(a(a(x1))))
198.16/50.71	 b(a(b(a(x1)))) -> b(b(a(b(x1))))
198.16/50.71	
198.16/50.71	Proof:
198.16/50.71	 Open
198.16/50.71	EOF