How to read the obstacles in the Disguise skill

In the Disguise skill, obstacles are written “Dwarf/Man Ob 2.” I know that means it’s an Ob 2 test for a Dwarf to pass as a Man. Does it also mean that it’s an Ob 2 test for Man to pass as a Dwarf. In other words, do I read these left-to-right and right-to-left, or only the former?

I’d call it both ways.