C111112111133131121133133313331333133313331312111133133313113313223313123123121   >>    C11111211113313112113313331333133313331333131211113313331311331322331312312312   <<    C111112111133131121133133313331333133313331312111133133313113313223313123123123   >>      C111112111133131121133133313331333133313331312111133133313113313223313123123122   >>