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 (6, 6)
Distance from target shape to purple square at (4, 3): 5
Distance from target shape to yellow square at (3, 3): 6
Distance from target shape to green trapezoid at (6, 0): 6
Closest shape is the purple square at (4, 3) with distance 5</think>

<answer>(4, 3)</answer>