There are 5 shapes on a 9x9 grid. Which shape is closest to the orange 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: orange rectangle at (1, 8)
Distance from target shape to gray rectangle at (4, 1): 10
Distance from target shape to brown square at (6, 6): 7
Distance from target shape to yellow trapezoid at (2, 1): 8
Distance from target shape to purple right_triangle at (1, 1): 7
Closest shape is the brown square at (6, 6) with distance 7</think>

<answer>(6, 6)</answer>