There are 3 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 (2, 8)
Distance from target shape to yellow right_triangle at (4, 7): 3
Distance from target shape to gray trapezoid at (3, 0): 9
Closest shape is the yellow right_triangle at (4, 7) with distance 3</think>

<answer>(4, 7)</answer>