There are 4 shapes on a 8x8 grid. Which shape is closest to the yellow 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: yellow trapezoid at (3, 1)
Distance from target shape to pink right_triangle at (6, 0): 4
Distance from target shape to gray trapezoid at (7, 4): 7
Distance from target shape to cyan rectangle at (0, 2): 4
Closest shape is the pink right_triangle at (6, 0) with distance 4</think>

<answer>(6, 0)</answer>