There are 5 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 (3, 5)
Distance from target shape to blue rectangle at (6, 2): 6
Distance from target shape to gray trapezoid at (6, 6): 4
Distance from target shape to orange square at (5, 0): 7
Distance from target shape to brown rectangle at (1, 1): 6
Closest shape is the gray trapezoid at (6, 6) with distance 4</think>

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