There are 4 shapes on a 10x10 grid. Which shape is closest to the purple 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: purple right_triangle at (9, 2)
Distance from target shape to green trapezoid at (7, 5): 5
Distance from target shape to gray right_triangle at (2, 5): 10
Distance from target shape to blue trapezoid at (3, 3): 7
Closest shape is the green trapezoid at (7, 5) with distance 5</think>

<answer>(7, 5)</answer>