Tìm những số khác biệt.

999999999999999999699999999999999999999999999999999998999999999999999999999099999999999999999999999999999999999999999999999999099999999999999999999999999999999998999999999999999999999969999999999999999999999999999999999999999999999999999999999999999999999999990999999999999999999999999999989999999999999999999999999999996999999099999999999999999999999999999999999999999999999999999999999999989999999999996999999999999999999999999999999999999999999999999999099999999999999999999999999999989999999999999999999999999999999999969999999999999999999999999999999999999999999999999999969999999999999999999989999999999999999999999099999999999999999999999999999999999999999999969999999999999999999999989999999999990999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999099999999999998999999999999999999999999999999999699999999999999999999999999999999999999999999999996999999999999999899999999999999999999909999999999999999999999999999999999999999999999999999999099999999999999999999999999969999999999999999899999999999999999999999999999999999999999999999999999999999999996999999999999999999999899999999999999999999909999999999999999999999999999999999999999999999999999999999999999969999999999999999999999999999999999999999999999998999999999999999999999999999999999999999999909999999999999999999999999999999999999999999989999999999999999999999699999999999999999999999999990999999999999999899999999999999999099999999999999999999999699999999999999999999999999999999999999999999999999999

Mỗi hàng đều có 3 chữ số khác những cố còn lại.Gợi ý cho zậy thôi nha.