There are 2 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 (4, 3)
Distance from target shape to yellow square at (4, 2): 1
Closest shape is the yellow square at (4, 2) with distance 1</think>

<answer>(4, 2)</answer>