There are 6 shapes on a 4x4 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 (3, 0)
Distance from target shape to green right_triangle at (2, 2): 3
Distance from target shape to pink square at (1, 2): 4
Distance from target shape to red trapezoid at (3, 3): 3
Distance from target shape to gray square at (1, 1): 3
Distance from target shape to orange rectangle at (0, 3): 6
Closest shape is the green right_triangle at (2, 2) with distance 3</think>

<answer>(2, 2)</answer>