There are 5 shapes on a 8x8 grid. Which shape is closest to the red 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: red rectangle at (7, 4)
Distance from target shape to gray trapezoid at (1, 0): 10
Distance from target shape to blue trapezoid at (6, 7): 4
Distance from target shape to cyan rectangle at (2, 1): 8
Distance from target shape to orange trapezoid at (0, 7): 10
Closest shape is the blue trapezoid at (6, 7) with distance 4</think>

<answer>(6, 7)</answer>