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

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