There are 3 shapes on a 5x5 grid. Which shape is closest to the gray 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: gray rectangle at (3, 4)
Distance from target shape to orange rectangle at (3, 0): 4
Distance from target shape to green square at (2, 3): 2
Closest shape is the green square at (2, 3) with distance 2</think>

<answer>(2, 3)</answer>