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

<answer>(2, 5)</answer>