There are 5 shapes on a 10x10 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, 6)
Distance from target shape to blue right_triangle at (3, 3): 4
Distance from target shape to cyan trapezoid at (5, 3): 4
Distance from target shape to green square at (4, 7): 1
Distance from target shape to red square at (4, 0): 6
Closest shape is the green square at (4, 7) with distance 1</think>

<answer>(4, 7)</answer>