[Gumlegs]

Boltat' - vragu pomogat'.

Ah. I was using the method Harpo Marx used when he toured the Soviet Union in the mid-1930s. His name in Cyrillic looked to him like "Xpano Mapcase," which he used for several years thereafter.

But using your rendition, I'd say the slogan is, "Attention! Use Ragu On Pomegranates!"

[AppyPappy]

Translation:

Stalin:I read your book, Comrade Mao. It sucks
Mao: Eat death, you drunken Slav retard.