It says "If it must touch the bottom side and then the top side along the way, how longis its shortest path?"
@divinedolphin Hi! Thanks so much for letting us know! We actually got this tip before from someone else; it's just that with all the other work that's going on, we haven't been able to get a chance to fix it. However, it's on our list of things to do. Thanks again for your help!