There are 6 shapes on a 9x9 grid. Which shape is closest to the cyan 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: cyan right_triangle at (8, 8)
Distance from target shape to pink trapezoid at (6, 4): 6
Distance from target shape to brown right_triangle at (1, 3): 12
Distance from target shape to green trapezoid at (1, 0): 15
Distance from target shape to orange trapezoid at (3, 8): 5
Distance from target shape to yellow square at (8, 5): 3
Closest shape is the yellow square at (8, 5) with distance 3</think>

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