There are 3 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, 3)
Distance from target shape to yellow right_triangle at (0, 4): 1
Distance from target shape to purple trapezoid at (3, 0): 6
Closest shape is the yellow right_triangle at (0, 4) with distance 1</think>

<answer>(0, 4)</answer>