There are 3 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 (1, 4)
Distance from target shape to orange right_triangle at (0, 4): 1
Distance from target shape to green right_triangle at (3, 5): 3
Closest shape is the orange right_triangle at (0, 4) with distance 1</think>

<answer>(0, 4)</answer>