There are 6 shapes on a 10x10 grid. Which shape is closest to the yellow 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: yellow square at (6, 3)
Distance from target shape to blue square at (0, 2): 7
Distance from target shape to gray rectangle at (8, 3): 2
Distance from target shape to brown rectangle at (3, 5): 5
Distance from target shape to purple trapezoid at (7, 7): 5
Distance from target shape to orange trapezoid at (8, 8): 7
Closest shape is the gray rectangle at (8, 3) with distance 2</think>

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