There are 6 shapes on a 10x10 grid. Which shape is closest to the yellow 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: yellow rectangle at (4, 9)
Distance from target shape to blue trapezoid at (4, 5): 4
Distance from target shape to brown rectangle at (1, 6): 6
Distance from target shape to purple trapezoid at (1, 9): 3
Distance from target shape to orange trapezoid at (3, 7): 3
Distance from target shape to gray trapezoid at (8, 1): 12
Closest shape is the purple trapezoid at (1, 9) with distance 3</think>

<answer>(1, 9)</answer>