There are 6 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 (8, 9)
Distance from target shape to cyan trapezoid at (4, 9): 4
Distance from target shape to red square at (9, 2): 8
Distance from target shape to gray trapezoid at (0, 6): 11
Distance from target shape to blue rectangle at (1, 5): 11
Distance from target shape to green trapezoid at (8, 5): 4
Closest shape is the cyan trapezoid at (4, 9) with distance 4</think>

<answer>(4, 9)</answer>