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