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 (0, 2)
Distance from target shape to blue right_triangle at (4, 6): 8
Distance from target shape to brown right_triangle at (2, 6): 6
Closest shape is the brown right_triangle at (2, 6) with distance 6</think>

<answer>(2, 6)</answer>