It's actually two interlocking parts but there's so much fuzz on one you can't make out half the notes or really hear the other one at all. As it should be.
The thing about this song is I've known it since I was in high school but until this week I'd only heard a version that's on a bunch of CDs and is completely different. There's no fuzz guitar or synthesizer at all and it sounds like they rerecorded the drums, if not the whole song. It's kind of a bland late 70s novelty song in that version, I had no idea it started out like this.