C312312111133131212111133133313231333133313331333113313232332311   >>    C31231211113313121211113313331323133313331333133311331323233231   <<    C312312111133131212111133133313231333133313331333113313232332313   >>      C312312111133131212111133133313231333133313331333113313232332312   >>