There are 6 shapes on a 8x8 grid. Which shape is closest to the cyan rectangle 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 rectangle at (6, 2)
Distance from target shape to pink trapezoid at (0, 1): 7
Distance from target shape to green square at (5, 4): 3
Distance from target shape to yellow right_triangle at (5, 7): 6
Distance from target shape to blue square at (3, 4): 5
Distance from target shape to brown right_triangle at (4, 6): 6
Closest shape is the green square at (5, 4) with distance 3</think>

<answer>(5, 4)</answer>