There are 5 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 (2, 6)
Distance from target shape to green square at (6, 2): 8
Distance from target shape to cyan square at (9, 2): 11
Distance from target shape to blue trapezoid at (5, 0): 9
Distance from target shape to orange right_triangle at (6, 7): 5
Closest shape is the orange right_triangle at (6, 7) with distance 5</think>

<answer>(6, 7)</answer>