There are 4 shapes on a 9x9 grid. Which shape is closest to the purple 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: purple trapezoid at (0, 1)
Distance from target shape to gray rectangle at (3, 0): 4
Distance from target shape to red right_triangle at (1, 1): 1
Distance from target shape to blue trapezoid at (7, 0): 8
Closest shape is the red right_triangle at (1, 1) with distance 1</think>

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