There are 3 shapes on a 8x8 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 (7, 3)
Distance from target shape to purple trapezoid at (5, 4): 3
Distance from target shape to red rectangle at (7, 2): 1
Closest shape is the red rectangle at (7, 2) with distance 1</think>

<answer>(7, 2)</answer>