There are 2 shapes on a 10x10 grid. Which shape is closest to the pink 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: pink right_triangle at (1, 2)
Distance from target shape to green right_triangle at (3, 8): 8
Closest shape is the green right_triangle at (3, 8) with distance 8</think>

<answer>(3, 8)</answer>