MAYBE
25.95/10.18	MAYBE
25.95/10.18	
25.95/10.18	Problem:
25.95/10.18	 a(x1) -> x1
25.95/10.18	 a(b(x1)) -> b(c(a(x1)))
25.95/10.18	 c(x1) -> b(x1)
25.95/10.18	 c(c(x1)) -> a(c(x1))
25.95/10.18	
25.95/10.18	Proof:
25.95/10.18	 Open
25.95/10.18	EOF