There are 4 shapes on a 10x10 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 (5, 4)
Distance from target shape to yellow trapezoid at (9, 2): 6
Distance from target shape to brown trapezoid at (1, 7): 7
Distance from target shape to orange trapezoid at (5, 3): 1
Closest shape is the orange trapezoid at (5, 3) with distance 1</think>

<answer>(5, 3)</answer>