"Whistle, daughter, whistle, and you shall have a sheep."
"Mother, I cannot whistle; neither can I sleep."
"Whistle, daughter, whistle, and you shall have a cow."
"Mother, I cannot whistle; neither know I how."
"Whistle, daughter, whistle, and you shall have a man."
"Mother, I cannot whistle, but I'll do the best I can."
-- Mother Goose