There are 3 shapes on a 10x10 grid. Which shape is closest to the orange 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: orange right_triangle at (2, 4)
Distance from target shape to red rectangle at (1, 5): 2
Distance from target shape to purple rectangle at (7, 9): 10
Closest shape is the red rectangle at (1, 5) with distance 2</think>

<answer>(1, 5)</answer>