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 (2, 1)
Distance from target shape to pink right_triangle at (1, 5): 5
Distance from target shape to blue square at (1, 3): 3
Distance from target shape to orange square at (3, 0): 2
Distance from target shape to purple square at (3, 3): 3
Closest shape is the orange square at (3, 0) with distance 2</think>

<answer>(3, 0)</answer>