MAYBE
35.31/10.31	MAYBE
35.31/10.31	
35.31/10.31	Problem:
35.31/10.31	 a(b(x1)) -> x1
35.31/10.31	 a(c(x1)) -> c(c(b(c(x1))))
35.31/10.31	 b(c(x1)) -> a(b(x1))
35.31/10.31	
35.31/10.31	Proof:
35.31/10.31	 Open
35.31/10.32	EOF