There are 3 shapes on a 10x10 grid. Which shape is closest to the blue 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: blue right_triangle at (2, 3)
Distance from target shape to purple square at (9, 6): 10
Distance from target shape to red right_triangle at (7, 5): 7
Closest shape is the red right_triangle at (7, 5) with distance 7</think>

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