MAYBE
37.44/10.31	MAYBE
37.44/10.31	
37.44/10.31	Problem:
37.44/10.31	 a(x1) -> x1
37.44/10.31	 a(a(x1)) -> b(a(b(c(c(x1)))))
37.44/10.31	 c(x1) -> x1
37.44/10.31	 c(b(x1)) -> a(x1)
37.44/10.31	
37.44/10.31	Proof:
37.44/10.31	 Open
37.44/10.31	EOF