There are 2 shapes on a 9x9 grid. Which shape is closest to the brown rectangle in terms of Manhattan distance? The final answer is the grid position of the closest shape like (row_index, column_index).
<think>Target shape: brown rectangle at (3, 7)
Distance from target shape to pink right_triangle at (8, 0): 12
Closest shape is the pink right_triangle at (8, 0) with distance 12</think>

<answer>(8, 0)</answer>