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

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