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

<answer>(2, 1)</answer>