There are 3 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 (2, 2)
Distance from target shape to cyan rectangle at (1, 4): 3
Distance from target shape to red trapezoid at (2, 3): 1
Closest shape is the red trapezoid at (2, 3) with distance 1</think>

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