There are 3 shapes on a 6x6 grid. Which shape is closest to the red 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: red right_triangle at (5, 5)
Distance from target shape to orange right_triangle at (3, 2): 5
Distance from target shape to pink trapezoid at (0, 4): 6
Closest shape is the orange right_triangle at (3, 2) with distance 5</think>

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