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

<answer>(1, 4)</answer>