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 (2, 3)
Distance from target shape to purple square at (6, 5): 6
Distance from target shape to gray right_triangle at (3, 6): 4
Distance from target shape to green trapezoid at (6, 2): 5
Closest shape is the gray right_triangle at (3, 6) with distance 4</think>

<answer>(3, 6)</answer>