There are 5 shapes on a 9x9 grid. Which shape is closest to the yellow 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: yellow right_triangle at (3, 5)
Distance from target shape to purple square at (1, 8): 5
Distance from target shape to pink right_triangle at (4, 2): 4
Distance from target shape to cyan rectangle at (2, 4): 2
Distance from target shape to orange rectangle at (6, 1): 7
Closest shape is the cyan rectangle at (2, 4) with distance 2</think>

<answer>(2, 4)</answer>