There are 5 shapes on a 8x8 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, 4)
Distance from target shape to gray right_triangle at (6, 7): 3
Distance from target shape to purple rectangle at (1, 0): 9
Distance from target shape to green trapezoid at (2, 0): 8
Distance from target shape to yellow right_triangle at (3, 4): 3
Closest shape is the gray right_triangle at (6, 7) with distance 3</think>

<answer>(6, 7)</answer>