There are 5 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 (1, 4)
Distance from target shape to gray rectangle at (3, 0): 6
Distance from target shape to red right_triangle at (1, 0): 4
Distance from target shape to cyan square at (0, 0): 5
Distance from target shape to pink square at (2, 2): 3
Closest shape is the pink square at (2, 2) with distance 3</think>

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