198.94/50.55	MAYBE
198.94/50.55	
198.94/50.55	Problem:
198.94/50.55	 a(a(b(b(x1)))) -> a(a(a(b(x1))))
198.94/50.55	 b(b(a(b(x1)))) -> a(a(b(a(x1))))
198.94/50.55	 b(a(a(a(x1)))) -> b(a(b(b(x1))))
198.94/50.55	
198.94/50.55	Proof:
198.94/50.55	 Open
199.32/50.56	EOF