Let S be the set of all values of λ, for which the shortest distance between the lines (x-λ)/0=(y-3)/4=(z+6)/1 and (x+λ)/3=y/-4=(z-6)/0 is 13. Then…

Let S be the set of all values of $\displaystyle \lambda$, for which the shortest distance between the lines $\displaystyle \frac{x-\lambda}{0}=\frac{y-3}{4}=\frac{z+6}{1}$ and $\displaystyle \frac{x+\lambda}{3}=\frac{y}{-4}=\frac{z-6}{0}$ is 13. Then $\displaystyle 8\left|\sum_{\lambda \in S} \lambda\right|$ is equal to