There are 5 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 (0, 0)
Distance from target shape to orange trapezoid at (5, 0): 5
Distance from target shape to gray right_triangle at (2, 5): 7
Distance from target shape to purple rectangle at (5, 5): 10
Distance from target shape to brown right_triangle at (1, 4): 5
Closest shape is the orange trapezoid at (5, 0) with distance 5</think>

<answer>(5, 0)</answer>