C313212111133131211331333133313331333133311233133313233313223113313121   >>    C31321211113313121133133313331333133313331123313331323331322311331312   <<    C313212111133131211331333133313331333133311233133313233313223113313123   >>      C313212111133131211331333133313331333133311233133313233313223113313122   >>