There are 2 shapes on a 10x10 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, 8)
Distance from target shape to blue trapezoid at (2, 9): 7
Closest shape is the blue trapezoid at (2, 9) with distance 7</think>

<answer>(2, 9)</answer>