There are 5 shapes on a 5x5 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 (0, 1)
Distance from target shape to green right_triangle at (4, 4): 7
Distance from target shape to purple rectangle at (2, 1): 2
Distance from target shape to cyan square at (2, 2): 3
Distance from target shape to blue rectangle at (3, 1): 3
Closest shape is the purple rectangle at (2, 1) with distance 2</think>

<answer>(2, 1)</answer>