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 (4, 3)
Distance from target shape to purple square at (1, 0): 6
Distance from target shape to cyan rectangle at (3, 3): 1
Distance from target shape to pink square at (1, 4): 4
Distance from target shape to gray trapezoid at (3, 4): 2
Closest shape is the cyan rectangle at (3, 3) with distance 1</think>

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