197.20/50.47	MAYBE
197.20/50.47	
197.20/50.47	Problem:
197.20/50.47	 a(a(a(x1))) -> a(b(c(c(c(x1)))))
197.20/50.47	 c(b(x1)) -> b(a(x1))
197.20/50.47	
197.20/50.47	Proof:
197.20/50.47	 Open
197.20/50.48	EOF