There are 4 shapes on a 9x9 grid. Which shape is closest to the gray 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: gray rectangle at (0, 6)
Distance from target shape to pink square at (2, 4): 4
Distance from target shape to cyan rectangle at (3, 7): 4
Distance from target shape to blue right_triangle at (5, 3): 8
Closest shape is the pink square at (2, 4) with distance 4</think>

<answer>(2, 4)</answer>