There are 5 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 (0, 0)
Distance from target shape to pink trapezoid at (2, 7): 9
Distance from target shape to blue trapezoid at (6, 6): 12
Distance from target shape to yellow rectangle at (1, 0): 1
Distance from target shape to purple right_triangle at (4, 3): 7
Closest shape is the yellow rectangle at (1, 0) with distance 1</think>

<answer>(1, 0)</answer>