There are 6 shapes on a 7x7 grid. Which shape is closest to the gray 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: gray trapezoid at (4, 0)
Distance from target shape to purple rectangle at (6, 3): 5
Distance from target shape to orange right_triangle at (1, 1): 4
Distance from target shape to cyan trapezoid at (2, 6): 8
Distance from target shape to brown trapezoid at (3, 0): 1
Distance from target shape to pink trapezoid at (6, 6): 8
Closest shape is the brown trapezoid at (3, 0) with distance 1</think>

<answer>(3, 0)</answer>