There are 2 shapes on a 10x10 grid. Which shape is closest to the gray 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: gray right_triangle at (6, 8)
Distance from target shape to blue trapezoid at (5, 9): 2
Closest shape is the blue trapezoid at (5, 9) with distance 2</think>

<answer>(5, 9)</answer>