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

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