There are 4 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 (3, 1)
Distance from target shape to orange right_triangle at (0, 5): 7
Distance from target shape to purple square at (5, 1): 2
Distance from target shape to gray rectangle at (3, 2): 1
Closest shape is the gray rectangle at (3, 2) with distance 1</think>

<answer>(3, 2)</answer>