There are 5 shapes on a 8x8 grid. Which shape is closest to the red 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: red trapezoid at (3, 0)
Distance from target shape to gray right_triangle at (2, 2): 3
Distance from target shape to orange square at (3, 1): 1
Distance from target shape to green square at (3, 5): 5
Distance from target shape to purple square at (6, 6): 9
Closest shape is the orange square at (3, 1) with distance 1</think>

<answer>(3, 1)</answer>