There are 6 shapes on a 10x10 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 (6, 9)
Distance from target shape to yellow right_triangle at (0, 5): 10
Distance from target shape to green square at (8, 1): 10
Distance from target shape to gray right_triangle at (0, 1): 14
Distance from target shape to cyan trapezoid at (7, 7): 3
Distance from target shape to purple right_triangle at (6, 0): 9
Closest shape is the cyan trapezoid at (7, 7) with distance 3</think>

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