There are 2 shapes on a 3x3 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 (2, 1)
Distance from target shape to red square at (0, 1): 2
Closest shape is the red square at (0, 1) with distance 2</think>

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