There are 6 shapes on a 5x5 grid. Which shape is closest to the blue 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: blue square at (2, 1)
Distance from target shape to gray rectangle at (0, 1): 2
Distance from target shape to green trapezoid at (4, 1): 2
Distance from target shape to pink square at (3, 0): 2
Distance from target shape to purple trapezoid at (1, 1): 1
Distance from target shape to orange trapezoid at (4, 2): 3
Closest shape is the purple trapezoid at (1, 1) with distance 1</think>

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