There are 6 shapes on a 6x6 grid. Which shape is closest to the cyan square 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 square at (5, 0)
Distance from target shape to purple right_triangle at (5, 1): 1
Distance from target shape to blue right_triangle at (1, 0): 4
Distance from target shape to yellow rectangle at (3, 5): 7
Distance from target shape to red square at (0, 3): 8
Distance from target shape to gray rectangle at (2, 2): 5
Closest shape is the purple right_triangle at (5, 1) with distance 1</think>

<answer>(5, 1)</answer>