There are 3 shapes on a 6x6 grid. Which shape is closest to the brown 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: brown right_triangle at (0, 2)
Distance from target shape to yellow rectangle at (0, 4): 2
Distance from target shape to purple right_triangle at (3, 2): 3
Closest shape is the yellow rectangle at (0, 4) with distance 2</think>

<answer>(0, 4)</answer>