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 (4, 1)
Distance from target shape to gray square at (2, 3): 4
Distance from target shape to green rectangle at (4, 4): 3
Distance from target shape to blue rectangle at (3, 3): 3
Distance from target shape to pink square at (0, 0): 5
Closest shape is the green rectangle at (4, 4) with distance 3</think>

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