There are 6 shapes on a 10x10 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 (8, 6)
Distance from target shape to red rectangle at (5, 0): 9
Distance from target shape to green trapezoid at (3, 5): 6
Distance from target shape to pink right_triangle at (4, 8): 6
Distance from target shape to blue square at (7, 2): 5
Distance from target shape to yellow rectangle at (8, 3): 3
Closest shape is the yellow rectangle at (8, 3) with distance 3</think>

<answer>(8, 3)</answer>