There are 3 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, 5)
Distance from target shape to blue square at (1, 3): 6
Distance from target shape to green rectangle at (4, 5): 1
Closest shape is the green rectangle at (4, 5) with distance 1</think>

<answer>(4, 5)</answer>