There are 5 shapes on a 6x6 grid. Which shape is closest to the purple 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: purple rectangle at (4, 0)
Distance from target shape to cyan trapezoid at (3, 2): 3
Distance from target shape to brown square at (1, 4): 7
Distance from target shape to gray rectangle at (2, 2): 4
Distance from target shape to red trapezoid at (0, 5): 9
Closest shape is the cyan trapezoid at (3, 2) with distance 3</think>

<answer>(3, 2)</answer>