C111112111133131121133133313331333133313331332133313331311331313233211   >>    C11111211113313112113313331333133313331333133213331333131133131323321   <<    C111112111133131121133133313331333133313331332133313331311331313233213   >>      C111112111133131121133133313331333133313331332133313331311331313233212   >>