197.27/50.27	MAYBE
197.27/50.27	
197.27/50.27	Problem:
197.27/50.27	 a(a(x1)) -> x1
197.27/50.27	 a(b(x1)) -> c(x1)
197.27/50.27	 c(c(x1)) -> b(c(b(a(a(x1)))))
197.27/50.27	
197.27/50.27	Proof:
197.27/50.27	 Open
197.27/50.28	EOF