C313212111133131211331333133313331333133311233133313232233212121   >>    C31321211113313121133133313331333133313331123313331323223321212   <<    C313212111133131211331333133313331333133311233133313232233212123   >>      C313212111133131211331333133313331333133311233133313232233212122   >>