C313212111133131211331333133313331333133311233133313221211113313311211   >>    C31321211113313121133133313331333133313331123313331322121111331331121   <<    C313212111133131211331333133313331333133311233133313221211113313311213   >>      C313212111133131211331333133313331333133311233133313221211113313311212   >>