There are 6 shapes on a 5x5 grid. Which shape is closest to the orange 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: orange right_triangle at (4, 4)
Distance from target shape to purple square at (3, 2): 3
Distance from target shape to pink square at (1, 4): 3
Distance from target shape to green square at (0, 4): 4
Distance from target shape to gray square at (3, 3): 2
Distance from target shape to red rectangle at (3, 1): 4
Closest shape is the gray square at (3, 3) with distance 2</think>

<answer>(3, 3)</answer>