There are 3 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 (3, 0)
Distance from target shape to purple rectangle at (3, 6): 6
Distance from target shape to brown trapezoid at (1, 1): 3
Closest shape is the brown trapezoid at (1, 1) with distance 3</think>

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