There are 4 shapes on a 10x10 grid. Which shape is closest to the orange 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: orange right_triangle at (2, 6)
Distance from target shape to yellow trapezoid at (4, 5): 3
Distance from target shape to red trapezoid at (4, 6): 2
Distance from target shape to blue trapezoid at (4, 9): 5
Closest shape is the red trapezoid at (4, 6) with distance 2</think>

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