public class Main {
    public static void main(String[] args){
        ArrayList<String> res = new ArrayList<>();
        ArrayList<Integer> list = new ArrayList<>();
        boolean flag = false;
        Scanner sc = new Scanner(System.in);
        while(sc.hasNextLine()){
            String str = sc.nextLine();
            res.add(str);
            if(str.equals("END")) break;
            String[] s = str.split("#");
            int n = Integer.parseInt(s[0]);
            int m = Integer.parseInt(s[1], n);
            list.add(m);
        }
        for(int i = 0; i < list.size(); i++){
            int m = list.get(i);
            if(list.lastIndexOf(m) == list.indexOf(m)){
                System.out.println(res.get(i));
                flag = true;
            }
        }
        if(!flag) System.out.println("None");
    }
}