C313212111133131211331333133313331333133311233133313221211113313133313233113121   >>    C31321211113313121133133313331333133313331123313331322121111331313331323311312   <<    C313212111133131211331333133313331333133311233133313221211113313133313233113123   >>      C313212111133131211331333133313331333133311233133313221211113313133313233113122   >>