There are 3 shapes on a 5x5 grid. Which shape is closest to the blue square in terms of Manhattan distance? The final answer is the grid position of the closest shape like (row_index, column_index).
<think>Target shape: blue square at (4, 1)
Distance from target shape to purple rectangle at (0, 4): 7
Distance from target shape to red square at (1, 0): 4
Closest shape is the red square at (1, 0) with distance 4</think>

<answer>(1, 0)</answer>