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 (2, 0)
Distance from target shape to blue square at (3, 0): 1
Distance from target shape to orange rectangle at (1, 0): 1
Distance from target shape to pink rectangle at (0, 1): 3
Distance from target shape to gray right_triangle at (3, 3): 4
Distance from target shape to green square at (3, 2): 3
Closest shape is the blue square at (3, 0) with distance 1</think>

<answer>(3, 0)</answer>