challenge4.go

func decodeMultipleStrings() string {
	f, _ := os.Open("4.txt")
	fs := bufio.NewScanner(f)
	for fs.Scan() {
		txt := fs.Text()
		decodedString := decoder(txt)
		if decodedString != "" {
			return decodedString
		}
	}
	return ""
}