Herbert Birdsfoot: Oh, I can only sing the high part. It's the only part I know. And when I sing the high part, This is how I go: La, la-la-la-la-la-la, la La, la-la-la-la-la-la. Ernie: I can only sing the middle. It's the only part I know, I know. And when I sing the middle part, This is how I go: La, la-la-la-la-la-la, la La, la-la-la-la-la-la. Bert: I can only sing the low part, low part, It's the only part I know, I know. And when I sing the low, low part, This is how I go. (That's beautiful, Bert!) La, la-la-la-la-la, la-la, la-la, La, la-la-la-la-la-la. Sung by all 3 together: When we put them all together I am sure you will agree, agree, The whole sounds better than the parts As you can plainly see. La, la-la-la-la-la, la-la, la-la, La, la-la-la-la-la-la, la la la la.