MAYBE
32.41/10.18	MAYBE
32.41/10.18	
32.41/10.18	Problem:
32.41/10.18	 a(x1) -> b(x1)
32.41/10.18	 a(b(x1)) -> x1
32.41/10.18	 b(a(x1)) -> a(c(a(b(x1))))
32.41/10.18	 c(c(x1)) -> x1
32.41/10.18	
32.41/10.18	Proof:
32.41/10.18	 Open
32.41/10.19	EOF