If the sum of squares of all real values of $\alpha$, for which the lines $2 \mathrm{x}-\mathrm{y}+3=0,6 \mathrm{x}+3 \mathrm{y}+1=0$ and $\alpha x+ 2 y-2=0$ do not form a triangle is $p$, then the greatest integer less than or equal to $p$ is
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