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Consider the 6x6 square in the figure. Let $A_{1}, A_{2}, .... A_{49}$ be the points of intersections (dots in the picture) in some order. We say that $A_{i}$ and $A_{j} (1 \leq i, j \leq 49)$ are friends if they are adjacent along a row or along a column.

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Consider the 6x6 square in the figure. Let A1,A2,....A49 be the points of intersections (dots in the picture) in some order. We say that Ai and Aj (1≤i,j≤49) are friends if they are adjacent along a row or along a column.