C313212111133131211331333133313331311331333131133133313232233311   >>    C31321211113313121133133313331333131133133313113313331323223331   <<    C313212111133131211331333133313331311331333131133133313232233313   >>      C313212111133131211331333133313331311331333131133133313232233312   >>