MAYBE
66.40/33.10	MAYBE
66.40/33.10	
66.40/33.10	Problem:
66.40/33.10	 a(x1) -> x1
66.40/33.10	 a(b(c(x1))) -> b(c(b(a(x1))))
66.40/33.10	 b(x1) -> c(a(x1))
66.40/33.10	
66.40/33.10	Proof:
66.40/33.10	 Open
66.40/33.11	EOF