There are 3 shapes on a 9x9 grid. Which shape is closest to the yellow right_triangle in terms of Manhattan distance? The final answer is the grid position of the closest shape like (row_index, column_index).
<think>Target shape: yellow right_triangle at (3, 7)
Distance from target shape to brown right_triangle at (6, 5): 5
Distance from target shape to purple trapezoid at (2, 2): 6
Closest shape is the brown right_triangle at (6, 5) with distance 5</think>

<answer>(6, 5)</answer>