There are 2 shapes on a 8x8 grid. Which shape is closest to the cyan 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: cyan right_triangle at (4, 0)
Distance from target shape to gray square at (0, 4): 8
Closest shape is the gray square at (0, 4) with distance 8</think>

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