There are 2 shapes on a 8x8 grid. Which shape is closest to the green rectangle 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 rectangle at (6, 7)
Distance from target shape to brown square at (3, 6): 4
Closest shape is the brown square at (3, 6) with distance 4</think>

<answer>(3, 6)</answer>