A baby spider is learning to crawl webs. When moving along a thread it marks it with a glowing venom as “visited” so that it does not visit the same thread again. It ends the exploration when there are no unvisited threads leading from the node it sits in. Is it possible that the spider will leave some edges unvisited by the end of exploration?
Where the spider might end its exploration (list all possibilities)
If it started in node B on the left web?
If it started in node L on the right web?