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 (2, 5)
Distance from target shape to brown square at (2, 3): 2
Distance from target shape to orange rectangle at (7, 3): 7
Distance from target shape to purple square at (7, 1): 9
Distance from target shape to green trapezoid at (6, 2): 7
Distance from target shape to blue square at (6, 7): 6
Closest shape is the brown square at (2, 3) with distance 2</think>

<answer>(2, 3)</answer>