There are 6 shapes on a 6x6 grid. Which shape is closest to the blue square in terms of Manhattan distance? The final answer is the grid position of the closest shape like (row_index, column_index).
<think>Target shape: blue square at (1, 4)
Distance from target shape to red square at (2, 2): 3
Distance from target shape to pink rectangle at (3, 5): 3
Distance from target shape to cyan trapezoid at (2, 3): 2
Distance from target shape to orange square at (2, 5): 2
Distance from target shape to purple right_triangle at (4, 5): 4
Closest shape is the cyan trapezoid at (2, 3) with distance 2</think>

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