There are 4 shapes on a 10x10 grid. Which shape is closest to the red 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: red trapezoid at (7, 5)
Distance from target shape to brown trapezoid at (0, 7): 9
Distance from target shape to purple rectangle at (1, 9): 10
Distance from target shape to gray square at (9, 1): 6
Closest shape is the gray square at (9, 1) with distance 6</think>

<answer>(9, 1)</answer>