There are 4 shapes on a 7x7 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, 3)
Distance from target shape to cyan right_triangle at (5, 2): 6
Distance from target shape to purple rectangle at (0, 6): 3
Distance from target shape to orange square at (2, 0): 5
Closest shape is the purple rectangle at (0, 6) with distance 3</think>

<answer>(0, 6)</answer>