There are 4 shapes on a 7x7 grid. Which shape is closest to the pink trapezoid 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 trapezoid at (1, 0)
Distance from target shape to blue square at (2, 6): 7
Distance from target shape to green square at (4, 2): 5
Distance from target shape to red rectangle at (4, 3): 6
Closest shape is the green square at (4, 2) with distance 5</think>

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