Apologies, I think we are still in the process of making videos for some of the older games. In the meantime, I can try to take a look at the setup. I would start by treating this as a multi linear game, knowing that the top rung will be the airline and the bottom the plane
_ _ _ _ _ _ _ _ _ _
Since we know that P is international and Q and r are domestic, we know that p comes before Q and R. We also know that since Q is the only fly high domestic, it must come after all of the other flights, and thus be last.
_ _ _ _ F _ _ _ _ Q
While we don't know if the other two flights are international or domestic, we still know that P is before R in our four remaining spots.
