There are 5 shapes on a 10x10 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 (9, 9)
Distance from target shape to orange trapezoid at (1, 2): 15
Distance from target shape to red trapezoid at (2, 9): 7
Distance from target shape to gray trapezoid at (7, 9): 2
Distance from target shape to brown square at (6, 3): 9
Closest shape is the gray trapezoid at (7, 9) with distance 2</think>

<answer>(7, 9)</answer>