There are 5 shapes on a 10x10 grid. Which shape is closest to the red square 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 square at (7, 8)
Distance from target shape to cyan trapezoid at (2, 9): 6
Distance from target shape to pink square at (0, 4): 11
Distance from target shape to yellow trapezoid at (3, 6): 6
Distance from target shape to gray square at (9, 7): 3
Closest shape is the gray square at (9, 7) with distance 3</think>

<answer>(9, 7)</answer>