C111112111133131121133133313331333133313331323133313331333133313221211123121   >>    C11111211113313112113313331333133313331333132313331333133313331322121112312   <<    C111112111133131121133133313331333133313331323133313331333133313221211123123   >>      C111112111133131121133133313331333133313331323133313331333133313221211123122   >>