There are 4 shapes on a 5x5 grid. Which shape is closest to the blue 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: blue rectangle at (1, 4)
Distance from target shape to gray right_triangle at (2, 2): 3
Distance from target shape to purple square at (2, 4): 1
Distance from target shape to yellow rectangle at (4, 0): 7
Closest shape is the purple square at (2, 4) with distance 1</think>

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