196.12/50.13	MAYBE
196.12/50.13	
196.12/50.13	Problem:
196.12/50.13	 a(x1) -> x1
196.12/50.13	 a(b(x1)) -> x1
196.12/50.13	 b(b(x1)) -> c(x1)
196.12/50.13	 c(a(x1)) -> a(a(b(c(x1))))
196.12/50.13	
196.12/50.13	Proof:
196.12/50.13	 Open
196.12/50.13	EOF