There are 2 shapes on a 9x9 grid. Which shape is closest to the red right_triangle 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 right_triangle at (0, 1)
Distance from target shape to green rectangle at (3, 7): 9
Closest shape is the green rectangle at (3, 7) with distance 9</think>

<answer>(3, 7)</answer>