MAYBE
33.85/10.34	MAYBE
33.85/10.34	
33.85/10.34	Problem:
33.85/10.34	 a(x1) -> x1
33.85/10.34	 a(b(x1)) -> c(b(x1))
33.85/10.34	 b(x1) -> a(a(c(x1)))
33.85/10.34	 c(c(x1)) -> b(x1)
33.85/10.34	
33.85/10.34	Proof:
33.85/10.34	 Open
33.85/10.34	EOF