There are 5 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 (4, 5)
Distance from target shape to green right_triangle at (2, 2): 5
Distance from target shape to brown square at (3, 3): 3
Distance from target shape to red right_triangle at (1, 1): 7
Distance from target shape to blue square at (6, 0): 7
Closest shape is the brown square at (3, 3) with distance 3</think>

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