There are 6 shapes on a 5x5 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 (4, 2)
Distance from target shape to purple right_triangle at (4, 4): 2
Distance from target shape to red right_triangle at (3, 3): 2
Distance from target shape to pink right_triangle at (0, 0): 6
Distance from target shape to brown trapezoid at (3, 0): 3
Distance from target shape to cyan square at (2, 0): 4
Closest shape is the purple right_triangle at (4, 4) with distance 2</think>

<answer>(4, 4)</answer>