There are 3 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, 2)
Distance from target shape to orange right_triangle at (1, 4): 4
Distance from target shape to red trapezoid at (7, 2): 4
Closest shape is the orange right_triangle at (1, 4) with distance 4</think>

<answer>(1, 4)</answer>