So MSJ shipped this question out to me, a few hours before it posted. I am the comment waiting for approval. Everybody else's comments on other questions are getting approved and mine's not. I thought that my answer was completely sufficient (if it works for my roommate it should work for Tone Deaf) and I feel slighted.
Is it because I submitted via mobile? I laboriously typed it up on my Kindle.
I am complaining about this because it's not important.
(The answer, by the way, is F C G Amin, with F C G C if you want to resolve the phrase. And if you're not that great a guitarist, because that's definitely not exactly what that dude played. My roommate is not that great a guitarist.)