There are 3 shapes on a 8x8 grid. Which shape is closest to the gray trapezoid 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 trapezoid at (2, 2)
Distance from target shape to red rectangle at (2, 7): 5
Distance from target shape to blue rectangle at (6, 1): 5
Closest shape is the red rectangle at (2, 7) with distance 5</think>

<answer>(2, 7)</answer>