1.70/0.76	YES
1.70/0.76	
1.70/0.76	Problem:
1.70/0.76	 a(a(a(a(x1)))) -> a(a(b(b(x1))))
1.70/0.76	 a(b(b(b(x1)))) -> b(b(a(a(x1))))
1.70/0.76	 b(a(a(a(x1)))) -> b(a(b(a(x1))))
1.70/0.76	
1.70/0.76	Proof:
1.70/0.76	 KBO Processor:
1.70/0.76	  weight function:
1.70/0.76	   w0 = 1
1.70/0.76	   w(b) = w(a) = 1
1.70/0.76	  precedence:
1.70/0.76	   a > b
1.70/0.76	  problem:
1.70/0.76	   
1.70/0.76	  Qed
1.84/0.77	EOF