There are 6 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 (1, 0)
Distance from target shape to cyan trapezoid at (0, 6): 7
Distance from target shape to blue trapezoid at (6, 2): 7
Distance from target shape to brown right_triangle at (3, 4): 6
Distance from target shape to pink rectangle at (7, 5): 11
Distance from target shape to purple square at (1, 5): 5
Closest shape is the purple square at (1, 5) with distance 5</think>

<answer>(1, 5)</answer>