195.86/50.15	MAYBE
195.86/50.15	
195.86/50.15	Problem:
195.86/50.15	 a(a(x1)) -> x1
195.86/50.15	 a(b(a(b(x1)))) -> b(a(b(b(a(a(x1))))))
195.86/50.15	
195.86/50.15	Proof:
195.86/50.15	 Open
195.86/50.15	EOF