There are 3 shapes on a 9x9 grid. Which shape is closest to the green 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: green trapezoid at (7, 3)
Distance from target shape to cyan rectangle at (5, 8): 7
Distance from target shape to yellow right_triangle at (8, 0): 4
Closest shape is the yellow right_triangle at (8, 0) with distance 4</think>

<answer>(8, 0)</answer>