C111112111133131121133133313331311331333131133133313233313221211   >>    C11111211113313112113313331333131133133313113313331323331322121   <<    C111112111133131121133133313331311331333131133133313233313221213   >>      C111112111133131121133133313331311331333131133133313233313221212   >>