There are 6 shapes on a 3x3 grid. Which shape is closest to the purple 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: purple square at (2, 0)
Distance from target shape to brown square at (0, 1): 3
Distance from target shape to red square at (2, 1): 1
Distance from target shape to green trapezoid at (1, 1): 2
Distance from target shape to pink trapezoid at (2, 2): 2
Distance from target shape to yellow square at (1, 0): 1
Closest shape is the red square at (2, 1) with distance 1</think>

<answer>(2, 1)</answer>