ok, got it Mario.

I have an old, brittle copy of sheet music of the 'Song of the Volga Boatmen' - that inspired the Cecil B. DeMille motion picture production "The Volga Boatman" with William Boyd and Elinor Fair...

Pull once more, lad,
pull once more!
Yo-o Heave Ho!
Yo-o Heave Ho!

so, here we go with more Mudcat verses

Pull my leg, Art,
Give us another pun,
Hap-py Birth-day, [Hunh!] Hap-py Birth-day. [Hunh!]