There are 3 shapes on a 10x10 grid. Which shape is closest to the green 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: green square at (2, 9)
Distance from target shape to gray square at (0, 0): 11
Distance from target shape to purple rectangle at (6, 8): 5
Closest shape is the purple rectangle at (6, 8) with distance 5</think>

<answer>(6, 8)</answer>