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

<answer>(3, 1)</answer>