There are 5 shapes on a 4x4 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 (0, 3)
Distance from target shape to orange rectangle at (1, 0): 4
Distance from target shape to purple rectangle at (0, 1): 2
Distance from target shape to red rectangle at (3, 3): 3
Distance from target shape to green trapezoid at (0, 0): 3
Closest shape is the purple rectangle at (0, 1) with distance 2</think>

<answer>(0, 1)</answer>