9
9b_is_vip
![](https://blog.hocmai.vn/wp-content/uploads/2017/07/hot.gif)
![](https://blog.hocmai.vn/wp-content/uploads/2017/07/hot.gif)
Tim chat fu hop : A + B => Khong pu
A + Cu => Khong pu
B + Cu => Khong pu
A + B + Cu => co pu
Biet A , B la hai muoi
A + Cu => Khong pu
B + Cu => Khong pu
A + B + Cu => co pu
Biet A , B la hai muoi