There are 4 shapes on a 9x9 grid. Which shape is closest to the brown square 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 square at (8, 2)
Distance from target shape to red right_triangle at (1, 7): 12
Distance from target shape to gray square at (4, 5): 7
Distance from target shape to purple rectangle at (3, 8): 11
Closest shape is the gray square at (4, 5) with distance 7</think>

<answer>(4, 5)</answer>