will have two leaves in elos double branch why is that you have a prefix code if symbol here maybe a symbol here some more symbols here in the lowest level branch which is this one over here there are two leads in higher levels that's not always true here that's not true here that's not true but the lowest level it's always true why is this always true imagine you didn't have two symbols left anymore only had one symbol after you didn't have this one here what do you do you would actually get rid of us all split here you put C up here and now