There are 2 shapes on a 10x10 grid. Which shape is closest to the blue 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: blue right_triangle at (9, 1)
Distance from target shape to red trapezoid at (6, 4): 6
Closest shape is the red trapezoid at (6, 4) with distance 6</think>

<answer>(6, 4)</answer>