There are 4 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 (8, 2)
Distance from target shape to orange right_triangle at (0, 2): 8
Distance from target shape to blue square at (3, 5): 8
Distance from target shape to yellow trapezoid at (2, 5): 9
Closest shape is the orange right_triangle at (0, 2) with distance 8</think>

<answer>(0, 2)</answer>