There are 5 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 (4, 0)
Distance from target shape to pink square at (4, 8): 8
Distance from target shape to brown trapezoid at (6, 1): 3
Distance from target shape to orange square at (9, 3): 8
Distance from target shape to blue trapezoid at (5, 0): 1
Closest shape is the blue trapezoid at (5, 0) with distance 1</think>

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