There are 6 shapes on a 7x7 grid. Which shape is closest to the green square 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 square at (0, 0)
Distance from target shape to cyan trapezoid at (2, 2): 4
Distance from target shape to orange rectangle at (5, 4): 9
Distance from target shape to blue right_triangle at (3, 2): 5
Distance from target shape to brown right_triangle at (6, 4): 10
Distance from target shape to purple trapezoid at (1, 0): 1
Closest shape is the purple trapezoid at (1, 0) with distance 1</think>

<answer>(1, 0)</answer>