There are 4 shapes on a 6x6 grid. Which shape is closest to the green trapezoid in terms of Manhattan distance? The final answer is the grid position of the closest shape like (row_index, column_index).
<think>Target shape: green trapezoid at (2, 4)
Distance from target shape to pink rectangle at (4, 0): 6
Distance from target shape to blue trapezoid at (1, 5): 2
Distance from target shape to purple rectangle at (3, 4): 1
Closest shape is the purple rectangle at (3, 4) with distance 1</think>

<answer>(3, 4)</answer>