There are 4 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, 0)
Distance from target shape to green rectangle at (3, 4): 4
Distance from target shape to red square at (0, 5): 8
Distance from target shape to blue rectangle at (5, 6): 8
Closest shape is the green rectangle at (3, 4) with distance 4</think>

<answer>(3, 4)</answer>