Help Please! Geometry Problem!

As shown in the diagram, $\angle MOL=30 ^\circ$ and $A$ is a point inside $\angle MOL$ with $OA=6$. Let $B$ and $C$ be points on rays $\overrightarrow {OM}$ and $\overrightarrow {OL}$ respectively. Find the smallest possible perimeter of $\triangle ABC$.
 

https://latex.artofproblemsolving.com/7/d/9/7d957ed179a1092b65680707dd356a356d05a02e.png