There are 4 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 (1, 0)
Distance from target shape to pink rectangle at (0, 4): 5
Distance from target shape to purple rectangle at (4, 2): 5
Distance from target shape to yellow square at (0, 0): 1
Closest shape is the yellow square at (0, 0) with distance 1</think>

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