C111112111133131121133133313331333133313331323133313331333133313112211231233211   >>    C11111211113313112113313331333133313331333132313331333133313331311221123123321   <<    C111112111133131121133133313331333133313331323133313331333133313112211231233213   >>      C111112111133131121133133313331333133313331323133313331333133313112211231233212   >>