What letters come next?
If you are saying the ABC's and have said A B C D E F G, the
letters H I J... would come next.
If you are saying every other letter of the alphabet and have
said A C E G, the letters I K M would come next.
If you are saying the alphabet backwards and have said Z Y X W,
the letters V U T would come next.
It all depends on what pattern of letters you are saying which
letters would come next.