There are 3 shapes on a 8x8 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 (2, 7)
Distance from target shape to yellow trapezoid at (4, 4): 5
Distance from target shape to purple trapezoid at (5, 0): 10
Closest shape is the yellow trapezoid at (4, 4) with distance 5</think>

<answer>(4, 4)</answer>