There are 4 shapes on a 9x9 grid. Which shape is closest to the brown 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: brown rectangle at (8, 1)
Distance from target shape to blue trapezoid at (5, 0): 4
Distance from target shape to cyan right_triangle at (1, 2): 8
Distance from target shape to green trapezoid at (6, 2): 3
Closest shape is the green trapezoid at (6, 2) with distance 3</think>

<answer>(6, 2)</answer>