The moral could be about the importance of friendship and cooperation among the four friends. They might face difficulties together and through their unity, they overcome challenges, teaching us that friends should support one another.
Well, often in such stories, the moral might be about loyalty as well. The four friends stay true to each other throughout the story. No matter what obstacles they encounter, they don't abandon one another. This shows that in real friendships, loyalty is a crucial element. It's about being there for your friends in good times and bad, just like these four friends in the story.