The first set of alternate notes makes the tune half a measure longer, so I had to include a blank measure for the other iterations. It looks kind of odd because this blank measure takes up its own line and seems superfluous at first, but it's the best solution I could think of.
I couldn't get the notes in the eighth measure of the first set of alternate notes to match up with the notes in the corresponding measures of the other iterations as well as I would have liked. Because there are so many eighth notes taking the place of quarter notes, there just wasn't enough space.
8' only
