C313212111133131211331333133313331333133311233133313233112213233231   >>    C31321211113313121133133313331333133313331123313331323311221323323   <<    C313212111133131211331333133313331333133311233133313233112213233233   >>      C313212111133131211331333133313331333133311233133313233112213233232   >>