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 (5, 2)
Distance from target shape to orange trapezoid at (3, 7): 7
Distance from target shape to blue trapezoid at (4, 0): 3
Distance from target shape to gray right_triangle at (8, 2): 3
Distance from target shape to cyan trapezoid at (1, 4): 6
Closest shape is the blue trapezoid at (4, 0) with distance 3</think>

<answer>(4, 0)</answer>