One of them is DHAP, which stands for dihydroxy acetone phosphate, and the other one is Gap, which stands for glycerol dehyd three phosphate. Now, this molecule is the one that will go on to stage three. So once we form this gap, it doesn't do anything else, but the DHAP doesn't lie directly on the path of glycolysis. And so what we have to do is we have to take this molecule and we have to transform it into this molecule. Now, just like glucose is an isomer to fructose, DHAP is an isomer to gap because both of these are triosis and a trios is a three carbon sugar. So we have one, two, three carbons, one, two, three carbons.