C1111233131211111211113313331333133313232212111133133311232212321211   >>    C111123313121111121111331333133313331323221211113313331123221232121   <<    C1111233131211111211113313331333133313232212111133133311232212321213   >>      C1111233131211111211113313331333133313232212111133133311232212321212   >>