There are 4 shapes on a 9x9 grid. Which shape is closest to the green square 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 square at (8, 2)
Distance from target shape to yellow square at (8, 4): 2
Distance from target shape to blue trapezoid at (3, 7): 10
Distance from target shape to orange right_triangle at (7, 0): 3
Closest shape is the yellow square at (8, 4) with distance 2</think>

<answer>(8, 4)</answer>