There are 5 shapes on a 9x9 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 (0, 7)
Distance from target shape to pink trapezoid at (7, 3): 11
Distance from target shape to purple right_triangle at (4, 6): 5
Distance from target shape to red rectangle at (4, 5): 6
Distance from target shape to green trapezoid at (4, 7): 4
Closest shape is the green trapezoid at (4, 7) with distance 4</think>

<answer>(4, 7)</answer>