There are 5 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 (1, 5)
Distance from target shape to brown trapezoid at (1, 0): 5
Distance from target shape to red right_triangle at (4, 1): 7
Distance from target shape to orange trapezoid at (4, 2): 6
Distance from target shape to gray square at (0, 1): 5
Closest shape is the brown trapezoid at (1, 0) with distance 5</think>

<answer>(1, 0)</answer>