There are 5 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 (3, 2)
Distance from target shape to purple square at (5, 0): 4
Distance from target shape to pink rectangle at (5, 4): 4
Distance from target shape to brown rectangle at (1, 0): 4
Distance from target shape to red right_triangle at (2, 0): 3
Closest shape is the red right_triangle at (2, 0) with distance 3</think>

<answer>(2, 0)</answer>