C31231211113313121211113313331323133313331333133313311232313232211   >>    C3123121111331312121111331333132313331333133313331331123231323221   <<    C31231211113313121211113313331323133313331333133313311232313232213   >>      C31231211113313121211113313331323133313331333133313311232313232212   >>