196.20/50.13	MAYBE
196.20/50.13	
196.20/50.13	Problem:
196.20/50.13	 a(x1) -> x1
196.20/50.13	 a(b(x1)) -> x1
196.20/50.13	 a(c(c(x1))) -> c(b(c(a(c(a(x1))))))
196.20/50.13	
196.20/50.13	Proof:
196.20/50.13	 Open
196.20/50.15	EOF