HELEN BARROW: If you want me to do a quick demo, I will give you three words then, totally without context. Okay? [She mouths three words.]
HZ: Well, it looked like you were saying, “baa, baa, baa,” but that, I assume, is not what you were saying.
HELEN BARROW: That wasn't what I was saying, no.
HZ: What were you saying? 
HELEN BARROW: So you've got the right one in that you've got the B. Yeah? So one of them was a B. So if I give you some context then, if I tell you one was a furry animal, one can be a civic leader, and one can be a piece of fruit. Okay, right, I'll do it again. [She mouths the same three words again.]
HZ: …I'm bad at this.
HELEN BARROW: But the thing is, I have deliberately picked three words that I know look alike, because, to go into the technical side of it, consonant confusion group, you know, a set of lip shapes that look alike.