There are 4 shapes on a 5x5 grid. Which shape is closest to the purple 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: purple rectangle at (1, 1)
Distance from target shape to cyan square at (1, 3): 2
Distance from target shape to orange rectangle at (0, 4): 4
Distance from target shape to red square at (3, 2): 3
Closest shape is the cyan square at (1, 3) with distance 2</think>

<answer>(1, 3)</answer>