C11112331312111112111133133313331333133313331333133313331333131133131221223121   >>    C1111233131211111211113313331333133313331333133313331333133313113313122122312   <<    C11112331312111112111133133313331333133313331333133313331333131133131221223123   >>      C11112331312111112111133133313331333133313331333133313331333131133131221223122   >>