There are 5 shapes on a 6x6 grid. Which shape is closest to the red 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: red trapezoid at (5, 4)
Distance from target shape to green right_triangle at (1, 2): 6
Distance from target shape to yellow rectangle at (3, 2): 4
Distance from target shape to purple square at (0, 1): 8
Distance from target shape to pink square at (0, 0): 9
Closest shape is the yellow rectangle at (3, 2) with distance 4</think>

<answer>(3, 2)</answer>