There are 4 shapes on a 8x8 grid. Which shape is closest to the purple 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: purple rectangle at (0, 6)
Distance from target shape to green rectangle at (2, 7): 3
Distance from target shape to blue square at (7, 6): 7
Distance from target shape to red trapezoid at (2, 2): 6
Closest shape is the green rectangle at (2, 7) with distance 3</think>

<answer>(2, 7)</answer>