197.71/50.59	MAYBE
197.71/50.59	
197.71/50.59	Problem:
197.71/50.59	 a(b(b(a(x1)))) -> b(a(b(b(x1))))
197.71/50.59	 a(a(a(a(x1)))) -> b(a(b(b(x1))))
197.71/50.59	 b(b(b(b(x1)))) -> a(a(b(a(x1))))
197.71/50.59	
197.71/50.59	Proof:
197.71/50.59	 Open
197.71/50.60	EOF