And to demonstrate what the difference is, let's take a look at the simplest monosaccharide that contains and value that is equal to three. So this is the ketos that consists of three carbons, six H atoms and three oxygens. And notice it's a ketos because on both sides of this carbon ill group, we essentially have these carbon atoms. And the specific name for this is dihydroxy acetone. Now, what about the aldos version of this same sugar molecule? So this is what we basically have.