There are 5 shapes on a 8x8 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 (2, 3)
Distance from target shape to purple rectangle at (3, 6): 4
Distance from target shape to orange rectangle at (4, 7): 6
Distance from target shape to gray trapezoid at (0, 1): 4
Distance from target shape to pink right_triangle at (5, 4): 4
Closest shape is the purple rectangle at (3, 6) with distance 4</think>

<answer>(3, 6)</answer>