There are 4 shapes on a 6x6 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 (2, 5)
Distance from target shape to purple square at (4, 2): 5
Distance from target shape to orange square at (4, 3): 4
Distance from target shape to pink square at (0, 5): 2
Closest shape is the pink square at (0, 5) with distance 2</think>

<answer>(0, 5)</answer>