There are 6 shapes on a 6x6 grid. Which shape is closest to the purple 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: purple trapezoid at (5, 0)
Distance from target shape to brown square at (1, 4): 8
Distance from target shape to red right_triangle at (3, 2): 4
Distance from target shape to pink trapezoid at (2, 3): 6
Distance from target shape to cyan trapezoid at (4, 4): 5
Distance from target shape to gray rectangle at (4, 1): 2
Closest shape is the gray rectangle at (4, 1) with distance 2</think>

<answer>(4, 1)</answer>