There are 3 shapes on a 5x5 grid. Which shape is closest to the blue 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: blue right_triangle at (3, 4)
Distance from target shape to pink trapezoid at (2, 2): 3
Distance from target shape to gray square at (4, 0): 5
Closest shape is the pink trapezoid at (2, 2) with distance 3</think>

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