C11111333133313232233133313331333133313331311331333133311213233311   >>    C1111133313331323223313331333133313331333131133133313331121323331   <<    C11111333133313232233133313331333133313331311331333133311213233313   >>      C11111333133313232233133313331333133313331311331333133311213233312   >>