There are 4 shapes on a 9x9 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, 7)
Distance from target shape to brown trapezoid at (2, 4): 9
Distance from target shape to yellow square at (1, 5): 9
Distance from target shape to orange square at (4, 8): 5
Closest shape is the orange square at (4, 8) with distance 5</think>

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