There are 2 shapes on a 10x10 grid. Which shape is closest to the pink right_triangle in terms of Manhattan distance? The final answer is the grid position of the closest shape like (row_index, column_index).
<think>Target shape: pink right_triangle at (8, 8)
Distance from target shape to gray square at (8, 9): 1
Closest shape is the gray square at (8, 9) with distance 1</think>

<answer>(8, 9)</answer>