There are 4 shapes on a 7x7 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 green rectangle at (0, 3): 3
Distance from target shape to blue square at (5, 4): 3
Distance from target shape to yellow square at (0, 4): 4
Closest shape is the green rectangle at (0, 3) with distance 3</think>

<answer>(0, 3)</answer>