There are 4 shapes on a 10x10 grid. Which shape is closest to the green 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: green rectangle at (3, 8)
Distance from target shape to yellow trapezoid at (5, 1): 9
Distance from target shape to purple square at (0, 5): 6
Distance from target shape to brown square at (7, 2): 10
Closest shape is the purple square at (0, 5) with distance 6</think>

<answer>(0, 5)</answer>