There are 3 shapes on a 8x8 grid. Which shape is closest to the brown 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: brown rectangle at (5, 2)
Distance from target shape to orange right_triangle at (0, 2): 5
Distance from target shape to gray square at (6, 5): 4
Closest shape is the gray square at (6, 5) with distance 4</think>

<answer>(6, 5)</answer>