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

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