8. As shown in the figure, the perimeter of square $A B C D$ is $40 \mathrm{~m}$. Two people, Jia and Yi, start from $A$ and $B$ respectively at the same time and walk along the edges of the square. Jia walks $35 \mathrm{~m}$ per minute in a counterclockwise direction, and Yi walks $30 \mathrm{~m}$ per minute in a clockwise direction. If the notation $(a, b)$ represents that the two people have been walking for $a$ minutes and have met $b$ times, then when the two people first find themselves at two opposite vertices of the square after starting, the corresponding notation should be $(\quad$.


$\begin{array}{l}8 . \\ (6,10)\end{array}$