There are 5 shapes on a 4x4 grid. Which shape is closest to the pink rectangle 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 rectangle at (2, 0)
Distance from target shape to green square at (2, 3): 3
Distance from target shape to brown right_triangle at (3, 0): 1
Distance from target shape to yellow rectangle at (1, 2): 3
Distance from target shape to red square at (2, 2): 2
Closest shape is the brown right_triangle at (3, 0) with distance 1</think>

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