C1111233131211111211113313331333133313232212111133131133133313331333112233311   >>    C111123313121111121111331333133313331323221211113313113313331333133311223331   <<    C1111233131211111211113313331333133313232212111133131133133313331333112233313   >>      C1111233131211111211113313331333133313232212111133131133133313331333112233312   >>