There are 4 shapes on a 6x6 grid. Which shape is closest to the brown trapezoid 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 trapezoid at (5, 3)
Distance from target shape to purple rectangle at (3, 3): 2
Distance from target shape to orange right_triangle at (5, 0): 3
Distance from target shape to cyan trapezoid at (0, 1): 7
Closest shape is the purple rectangle at (3, 3) with distance 2</think>

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