Woof woof

An Alsatian went to a telegram office, took out a blank form and wrote:
“Woof. Woof. Woof. Woof. Woof. Woof. Woof. Woof. Woof.”
The clerk examined the paper and politely told the dog: “There are only nine words here. You could send another ‘Woof’ for the same price.”
“But,” the dog replied, “that would make no sense at all.”