There are 6 shapes on a 8x8 grid. Which shape is closest to the gray 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: gray rectangle at (6, 5)
Distance from target shape to yellow trapezoid at (5, 7): 3
Distance from target shape to brown rectangle at (0, 4): 7
Distance from target shape to pink square at (4, 2): 5
Distance from target shape to orange rectangle at (0, 0): 11
Distance from target shape to purple right_triangle at (5, 2): 4
Closest shape is the yellow trapezoid at (5, 7) with distance 3</think>

<answer>(5, 7)</answer>