1.63/0.73	YES
1.63/0.73	
1.63/0.73	Problem:
1.63/0.73	 b(b(b(b(x1)))) -> a(a(b(b(x1))))
1.63/0.73	 a(a(b(a(x1)))) -> a(a(a(b(x1))))
1.63/0.73	 b(a(a(a(x1)))) -> a(b(a(b(x1))))
1.63/0.73	
1.63/0.73	Proof:
1.63/0.73	 KBO Processor:
1.63/0.73	  weight function:
1.63/0.73	   w0 = 1
1.63/0.73	   w(a) = w(b) = 1
1.63/0.73	  precedence:
1.63/0.73	   b > a
1.63/0.73	  problem:
1.63/0.73	   
1.63/0.73	  Qed
1.63/0.73	EOF