There are 6 shapes on a 5x5 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 (4, 2)
Distance from target shape to purple right_triangle at (1, 1): 4
Distance from target shape to green rectangle at (3, 4): 3
Distance from target shape to cyan rectangle at (0, 4): 6
Distance from target shape to yellow trapezoid at (2, 3): 3
Distance from target shape to red right_triangle at (2, 1): 3
Closest shape is the green rectangle at (3, 4) with distance 3</think>

<answer>(3, 4)</answer>