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 (0, 0)
Distance from target shape to purple right_triangle at (0, 3): 3
Distance from target shape to red right_triangle at (3, 4): 7
Closest shape is the purple right_triangle at (0, 3) with distance 3</think>

<answer>(0, 3)</answer>