MAYBE
38.81/11.69	MAYBE
38.81/11.69	
38.81/11.69	Problem:
38.81/11.69	 a(x1) -> x1
38.81/11.69	 a(b(x1)) -> b(c(a(a(x1))))
38.81/11.69	 a(c(c(x1))) -> b(a(x1))
38.81/11.69	
38.81/11.69	Proof:
38.81/11.69	 Open
38.81/11.69	EOF