And that's exactly what I do here. Now, I have two carbon atoms on this side and two carbon atoms on this side. Next, I want to balance out the carbon or the MN atoms on this side in this reduction reaction. So, since I have one MN here and one Amen here, it's already balanced. So, in the fourth step, let's balance out the oxygen molecules by adding water molecules. And let's balance the h atoms by adding H plus ions.