There are 6 shapes on a 8x8 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, 5)
Distance from target shape to cyan rectangle at (3, 3): 3
Distance from target shape to green right_triangle at (1, 3): 3
Distance from target shape to gray square at (4, 2): 5
Distance from target shape to purple rectangle at (4, 3): 4
Distance from target shape to red trapezoid at (2, 6): 1
Closest shape is the red trapezoid at (2, 6) with distance 1</think>

<answer>(2, 6)</answer>