709.98/299.38	MAYBE
709.98/299.38	
709.98/299.38	Problem:
709.98/299.38	 strict:
709.98/299.38	  a(d(x1)) -> d(b(x1))
709.98/299.38	  a(x1) -> b(b(b(x1)))
709.98/299.38	  d(x1) -> x1
709.98/299.38	  a(x1) -> x1
709.98/299.38	  b(c(x1)) -> c(d(d(x1)))
709.98/299.38	  a(c(x1)) -> b(b(c(d(x1))))
709.98/299.38	 weak:
709.98/299.38	  b(d(b(x1))) -> a(d(x1))
709.98/299.38	  a(d(x1)) -> b(d(b(x1)))
709.98/299.38	
709.98/299.38	Proof:
709.98/299.38	 Open
709.98/299.39	EOF