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

<answer>(3, 0)</answer>