Now, to find out what comes next, we have to go to this experiment one. So we have glycine tryptophan, and the only time we have glycine tryptophan here is in this fragment one glycine tryptophan. Now, this third amino acid basically tells us which fragment must be connected to this one. So we have arginine appears in this fragment and nowhere else. And so that means the next fragment connected to this one is this fragment here. So let's place arginine and tyrosine, the third fragment here.