import java.util.Scanner;

public class Ege14 {
    public static void main(String [] args){
        Scanner s = new Scanner(System.in);
        int N = s.nextInt();
        int a[] = new int[99];
        for(int i = 0 ; i < 99 ; i++) {
            a[i] = 0;
        }
        for(int i = 0 ; i < N ; i++){
            s.next();
            s.next();
            int p = s.nextInt();
            a[p-1]++;
        }
        int max = 0;
        for(int i = 0 ; i < 99 ; i++ ){
         if(a[i] > max){
             max = a[i];
         }
        }
        for (int i = 0 ; i < 99 ; i++){
            if (a[i] == max){
                System.out.print(i+1 + " " );
            }
        }

    }
}