C111112111133131121133133313331333133313331323133313331333133211113313233313121   >>    C11111211113313112113313331333133313331333132313331333133313321111331323331312   <<    C111112111133131121133133313331333133313331323133313331333133211113313233313123   >>      C111112111133131121133133313331333133313331323133313331333133211113313233313122   >>