There are 4 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 (7, 2)
Distance from target shape to gray rectangle at (5, 2): 2
Distance from target shape to cyan right_triangle at (1, 6): 10
Distance from target shape to purple right_triangle at (2, 5): 8
Closest shape is the gray rectangle at (5, 2) with distance 2</think>

<answer>(5, 2)</answer>