There are 6 shapes on a 5x5 grid. Which shape is closest to the pink 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: pink square at (3, 3)
Distance from target shape to yellow rectangle at (0, 3): 3
Distance from target shape to green right_triangle at (0, 0): 6
Distance from target shape to gray trapezoid at (2, 2): 2
Distance from target shape to purple rectangle at (3, 4): 1
Distance from target shape to blue rectangle at (4, 2): 2
Closest shape is the purple rectangle at (3, 4) with distance 1</think>

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