C1111121111331311211331333133313331333133313231333133313331333133311223123121   >>    C111112111133131121133133313331333133313331323133313331333133313331122312312   <<    C1111121111331311211331333133313331333133313231333133313331333133311223123123   >>      C1111121111331311211331333133313331333133313231333133313331333133311223123122   >>