689.46/299.46	MAYBE
689.46/299.46	
689.46/299.46	Problem:
689.46/299.46	 strict:
689.46/299.46	  f(a(),g(y),z) -> f(b(),g(y),g(y))
689.46/299.46	  f(b(),g(y),z) -> f(a(),y,z)
689.46/299.46	  a() -> b()
689.46/299.46	 weak:
689.46/299.46	  f(x,y,z) -> f(x,y,g(z))
689.46/299.46	
689.46/299.46	Proof:
689.46/299.46	 Open
689.46/299.46	EOF