There are 4 shapes on a 7x7 grid. Which shape is closest to the pink 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: pink rectangle at (5, 2)
Distance from target shape to purple right_triangle at (2, 3): 4
Distance from target shape to yellow square at (1, 4): 6
Distance from target shape to gray rectangle at (4, 2): 1
Closest shape is the gray rectangle at (4, 2) with distance 1</think>

<answer>(4, 2)</answer>