There are 5 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 (2, 0)
Distance from target shape to gray rectangle at (0, 0): 2
Distance from target shape to red right_triangle at (3, 3): 4
Distance from target shape to blue square at (3, 7): 8
Distance from target shape to purple rectangle at (6, 5): 9
Closest shape is the gray rectangle at (0, 0) with distance 2</think>

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