1.83/0.78	YES
1.83/0.78	
1.83/0.78	Problem:
1.83/0.78	 a(a(a(a(x1)))) -> b(a(a(a(x1))))
1.83/0.78	 b(b(a(b(x1)))) -> a(a(b(b(x1))))
1.83/0.78	 a(a(b(a(x1)))) -> a(a(a(b(x1))))
1.83/0.78	
1.83/0.78	Proof:
1.83/0.78	 String Reversal Processor:
1.83/0.78	  a(a(a(a(x1)))) -> a(a(a(b(x1))))
1.83/0.78	  b(a(b(b(x1)))) -> b(b(a(a(x1))))
1.83/0.78	  a(b(a(a(x1)))) -> b(a(a(a(x1))))
1.83/0.78	  KBO Processor:
1.83/0.78	   weight function:
1.83/0.78	    w0 = 1
1.83/0.78	    w(b) = w(a) = 1
1.83/0.78	   precedence:
1.83/0.78	    a > b
1.83/0.78	   problem:
1.83/0.78	    
1.83/0.78	   Qed
1.83/0.79	EOF