Granny, this isn't an A-Z, it's a chain, thus you're supposed to start your submission with the last letter of the previous post.
So, as YELL ends in 'L' your post should start with L, e.g. London, or, Luton, or Luxemburg. If you had used London or Luton the next poster would nave had to start with 'N', while Luxemburg would have meant the next entry would have to start with 'G'.