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 (8, 4)
Distance from target shape to orange trapezoid at (2, 0): 10
Distance from target shape to blue right_triangle at (0, 0): 12
Distance from target shape to yellow trapezoid at (0, 8): 12
Closest shape is the orange trapezoid at (2, 0) with distance 10</think>

<answer>(2, 0)</answer>