There are 3 shapes on a 6x6 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 (2, 3)
Distance from target shape to purple right_triangle at (1, 5): 3
Distance from target shape to yellow trapezoid at (3, 2): 2
Closest shape is the yellow trapezoid at (3, 2) with distance 2</think>

<answer>(3, 2)</answer>