For some reason I was really getting lost on step 2, “sort” it. They mean lexicographically or “sort it like each rotation is a word in the dictionary, where $

For some reason I was really getting lost on step 2, “sort” it. They mean lexicographically or “sort it like each rotation is a word in the dictionary, where $ has the lowest character value”. Now that I see it, I’m a little embarrassed I got stuck on that step, but hopefully it helps someone else.