There are 3 shapes on a 10x10 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 (9, 7)
Distance from target shape to brown right_triangle at (6, 9): 5
Distance from target shape to cyan rectangle at (1, 2): 13
Closest shape is the brown right_triangle at (6, 9) with distance 5</think>

<answer>(6, 9)</answer>