Letter / Not A Letter lyrics

Song information

Artist: They Might Be Giants
Album: Here Come The Abcs

Lyrics

What's that?
That is a letter
What is that?
That's not a letter
That's a letter
That's not a letter
That is a letter
Is that a letter?
I don't know what that is
That's so a letter
What is that?
Whatever it is, that's not a letter
That's a letter
Is that a letter, or what?
That's a letter. only it's upside down