There are 5 shapes on a 9x9 grid. Which shape is closest to the blue 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: blue right_triangle at (3, 3)
Distance from target shape to yellow square at (5, 8): 7
Distance from target shape to pink rectangle at (3, 2): 1
Distance from target shape to gray trapezoid at (3, 1): 2
Distance from target shape to brown rectangle at (0, 1): 5
Closest shape is the pink rectangle at (3, 2) with distance 1</think>

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