There are 6 shapes on a 10x10 grid. Which shape is closest to the gray 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: gray rectangle at (5, 9)
Distance from target shape to pink right_triangle at (5, 5): 4
Distance from target shape to orange rectangle at (7, 0): 11
Distance from target shape to blue trapezoid at (3, 9): 2
Distance from target shape to red rectangle at (2, 5): 7
Distance from target shape to green square at (7, 4): 7
Closest shape is the blue trapezoid at (3, 9) with distance 2</think>

<answer>(3, 9)</answer>