There are 5 shapes on a 5x5 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 (0, 0)
Distance from target shape to purple rectangle at (4, 0): 4
Distance from target shape to blue right_triangle at (0, 1): 1
Distance from target shape to cyan square at (2, 2): 4
Distance from target shape to red rectangle at (3, 4): 7
Closest shape is the blue right_triangle at (0, 1) with distance 1</think>

<answer>(0, 1)</answer>