C11111333133313232233133313331333131133131121131211113311233311   >>    C1111133313331323223313331333133313113313112113121111331123331   <<    C11111333133313232233133313331333131133131121131211113311233313   >>      C11111333133313232233133313331333131133131121131211113311233312   >>