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

<answer>(2, 1)</answer>