There are 4 shapes on a 5x5 grid. Which shape is closest to the yellow 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: yellow rectangle at (0, 3)
Distance from target shape to blue right_triangle at (4, 1): 6
Distance from target shape to red rectangle at (2, 0): 5
Distance from target shape to gray square at (1, 2): 2
Closest shape is the gray square at (1, 2) with distance 2</think>

<answer>(1, 2)</answer>