There are 3 shapes on a 7x7 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 (4, 0)
Distance from target shape to green rectangle at (0, 4): 8
Distance from target shape to orange rectangle at (5, 6): 7
Closest shape is the orange rectangle at (5, 6) with distance 7</think>

<answer>(5, 6)</answer>