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 (7, 8)
Distance from target shape to yellow trapezoid at (0, 5): 10
Distance from target shape to pink right_triangle at (1, 8): 6
Distance from target shape to green rectangle at (0, 3): 12
Distance from target shape to orange square at (2, 2): 11
Distance from target shape to red rectangle at (7, 1): 7
Closest shape is the pink right_triangle at (1, 8) with distance 6</think>

<answer>(1, 8)</answer>