There are 2 shapes on a 7x7 grid. Which shape is closest to the yellow 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: yellow square at (4, 4)
Distance from target shape to red rectangle at (4, 1): 3
Closest shape is the red rectangle at (4, 1) with distance 3</think>

<answer>(4, 1)</answer>