C313212111133131211331333133313331333133311233133313311232233132223221   >>    C31321211113313121133133313331333133313331123313331331123223313222322   <<    C313212111133131211331333133313331333133311233133313311232233132223223   >>      C313212111133131211331333133313331333133311233133313311232233132223222   >>