There are 6 shapes on a 9x9 grid. Which shape is closest to the purple 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: purple trapezoid at (4, 2)
Distance from target shape to pink right_triangle at (6, 0): 4
Distance from target shape to green trapezoid at (8, 2): 4
Distance from target shape to orange rectangle at (8, 8): 10
Distance from target shape to blue trapezoid at (2, 0): 4
Distance from target shape to brown trapezoid at (2, 4): 4
Closest shape is the pink right_triangle at (6, 0) with distance 4</think>

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