726.80/299.39	MAYBE
726.80/299.39	
726.80/299.39	Problem:
726.80/299.39	 strict:
726.80/299.39	  a(c(b(x1))) -> b(a(b(x1)))
726.80/299.39	  a(b(c(x1))) -> b(b(c(x1)))
726.80/299.39	 weak:
726.80/299.39	  a(b(c(x1))) -> c(c(b(x1)))
726.80/299.39	  b(a(c(x1))) -> c(a(c(x1)))
726.80/299.39	  a(a(c(x1))) -> a(a(b(x1)))
726.80/299.39	  b(c(a(x1))) -> a(c(b(x1)))
726.80/299.39	  a(a(a(x1))) -> c(a(b(x1)))
726.80/299.39	
726.80/299.39	Proof:
726.80/299.39	 Open
726.80/299.39	EOF