Scala app that prints the English words for the numbers 1 to 99 without ever using any number type

CountTo99WithoutNumbers.scala

object CountTo99WithoutNumbers extends App {

	object PrimaryNumber extends Enumeration {
		val zero, one, two, three, four, five, six, seven, eight, nine = Value
	}
	
	object StrangeNumber extends Enumeration {
		val eleven, twelve, thirteen = Value
	}
	
	object Prefixes extends Enumeration {
		val zero, ten, twenty, thirty, forty, fifty, sixty, seventy, eighty, ninety = Value
	}
	
	def teens(x: PrimaryNumber.Value): String = {
		x match {
			case PrimaryNumber.one => StrangeNumber.eleven.toString
			case PrimaryNumber.two => StrangeNumber.twelve.toString
			case PrimaryNumber.three => StrangeNumber.thirteen.toString
			case _ => s"${x}teen"
		}
	}
	
	def print(x: Prefixes.Value, y: PrimaryNumber.Value): Unit = {
		(x, y) match {
			case (_, PrimaryNumber.zero) => println(x.toString)
			case (Prefixes.zero, _) => println(y.toString)
			case (Prefixes.ten, _) => println(teens(y))
			case _ => println(s"$x-$y")
		}
	}
	
	for {
		x <- Prefixes.values
		y <- PrimaryNumber.values
	} yield print(x, y)

}

Observed output:

[ bin ]> ./scala CountTo99WithoutNumbers
zero
one
two
three
four
five
six
seven
eight
nine
ten
eleven
twelve
thirteen
fourteen
fiveteen
sixteen
seventeen
eightteen
nineteen
twenty
twenty-one
twenty-two
twenty-three
twenty-four
twenty-five
twenty-six
twenty-seven
twenty-eight
twenty-nine
thirty
thirty-one
thirty-two
thirty-three
thirty-four
thirty-five
thirty-six
thirty-seven
thirty-eight
thirty-nine
forty
forty-one
forty-two
forty-three
forty-four
forty-five
forty-six
forty-seven
forty-eight
forty-nine
fifty
fifty-one
fifty-two
fifty-three
fifty-four
fifty-five
fifty-six
fifty-seven
fifty-eight
fifty-nine
sixty
sixty-one
sixty-two
sixty-three
sixty-four
sixty-five
sixty-six
sixty-seven
sixty-eight
sixty-nine
seventy
seventy-one
seventy-two
seventy-three
seventy-four
seventy-five
seventy-six
seventy-seven
seventy-eight
seventy-nine
eighty
eighty-one
eighty-two
eighty-three
eighty-four
eighty-five
eighty-six
eighty-seven
eighty-eight
eighty-nine
ninety
ninety-one
ninety-two
ninety-three
ninety-four
ninety-five
ninety-six
ninety-seven
ninety-eight
ninety-nine