And once we form these two structures, two more protons are abstracted from the matrix, and those two protons are basically used to form two water molecules. So one of these protons is picked up by, let's say, this hydroxide group, and the other proton is picked up by this hydroxide group. And so these two bonds are formed. These two bonds are broken. We regenerate these two groups in their original initial oxidized form, and we also form the two water molecules. So this is the final step.