There are 6 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 (5, 3)
Distance from target shape to gray rectangle at (3, 1): 4
Distance from target shape to pink trapezoid at (8, 7): 7
Distance from target shape to cyan rectangle at (8, 5): 5
Distance from target shape to purple right_triangle at (3, 2): 3
Distance from target shape to orange rectangle at (7, 3): 2
Closest shape is the orange rectangle at (7, 3) with distance 2</think>

<answer>(7, 3)</answer>