There are 3 shapes on a 5x5 grid. Which shape is closest to the red rectangle in terms of Manhattan distance? The final answer is the grid position of the closest shape like (row_index, column_index).
<think>Target shape: red rectangle at (0, 4)
Distance from target shape to pink right_triangle at (4, 3): 5
Distance from target shape to cyan rectangle at (4, 2): 6
Closest shape is the pink right_triangle at (4, 3) with distance 5</think>

<answer>(4, 3)</answer>