There are 4 shapes on a 10x10 grid. Which shape is closest to the yellow 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: yellow right_triangle at (1, 1)
Distance from target shape to cyan right_triangle at (8, 7): 13
Distance from target shape to pink right_triangle at (2, 5): 5
Distance from target shape to blue rectangle at (7, 6): 11
Closest shape is the pink right_triangle at (2, 5) with distance 5</think>

<answer>(2, 5)</answer>