Song Origin

A quote from JT in a June 11, 1981 Rolling Stone article:
“The song B.S.U.R. on Flag was inspired by the cartoons of William Steig, who has a book out called CDB! about how to take letters and numbers and turn them into sentences, like IMAUMBN (I am a human being) or URNNML (You are an animal). Well, my sister and I used to play that game.”