There are 5 shapes on a 9x9 grid. Which shape is closest to the purple 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: purple right_triangle at (4, 7)
Distance from target shape to cyan square at (0, 8): 5
Distance from target shape to brown trapezoid at (5, 8): 2
Distance from target shape to yellow rectangle at (5, 2): 6
Distance from target shape to pink rectangle at (7, 6): 4
Closest shape is the brown trapezoid at (5, 8) with distance 2</think>

<answer>(5, 8)</answer>