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 (0, 3)
Distance from target shape to pink square at (0, 4): 1
Distance from target shape to brown rectangle at (5, 1): 7
Closest shape is the pink square at (0, 4) with distance 1</think>

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