C31231211111133131211113313331333133313332231131211113312111133132233133213211   >>    C3123121111113313121111331333133313331333223113121111331211113313223313321321   <<    C31231211111133131211113313331333133313332231131211113312111133132233133213213   >>      C31231211111133131211113313331333133313332231131211113312111133132233133213212   >>