Reusing base types with new methods #golang

roman.go

var numText = "zero one two three four five six seven eight nine ten"
var numRoman = "- I II III IV V VI VII IX X"
var aText = strings.Split(numText, " ", 0)
var aRoman = strings.Split(numRoman, " ", 0)

type TextNumber int
type RomanNumber int

func (n TextNumber) String() string {
  return aText[n];
}
func (n RomanNumber) String() string {
  return aRoman[n];
}
func main() {
  var i = 5;
  fmt.Println("Number: ", i, TextNumber(i), RomanNumber(i));
}