There are 4 shapes on a 8x8 grid. Which shape is closest to the orange 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: orange trapezoid at (0, 4)
Distance from target shape to red rectangle at (3, 7): 6
Distance from target shape to green right_triangle at (7, 6): 9
Distance from target shape to purple trapezoid at (6, 4): 6
Closest shape is the red rectangle at (3, 7) with distance 6</think>

<answer>(3, 7)</answer>