C313212111133131211331333133313331333133311233133313233313232233133112112121   >>    C31321211113313121133133313331333133313331123313331323331323223313311211212   <<    C313212111133131211331333133313331333133311233133313233313232233133112112123   >>      C313212111133131211331333133313331333133311233133313233313232233133112112122   >>