There are 5 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 (2, 2)
Distance from target shape to blue right_triangle at (1, 5): 4
Distance from target shape to brown trapezoid at (0, 0): 4
Distance from target shape to orange right_triangle at (0, 4): 4
Distance from target shape to purple rectangle at (2, 5): 3
Closest shape is the purple rectangle at (2, 5) with distance 3</think>

<answer>(2, 5)</answer>