There are 3 shapes on a 5x5 grid. Which shape is closest to the gray 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: gray square at (2, 1)
Distance from target shape to cyan rectangle at (3, 0): 2
Distance from target shape to pink square at (3, 2): 2
Closest shape is the cyan rectangle at (3, 0) with distance 2</think>

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