There are 2 shapes on a 8x8 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 (2, 3)
Distance from target shape to cyan rectangle at (0, 4): 3
Closest shape is the cyan rectangle at (0, 4) with distance 3</think>

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