import java.io.*;
import java.util.*;
//import java.math.*;

public class Main
{
    public static void main(String[] args) throws IOException {
        BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
        PrintWriter out = new PrintWriter(new OutputStreamWriter(System.out));
        //String[] name = new String[6];
        String[] device = new String[6];
        int[] price = new int[6];
        Map<String,Integer> result = new TreeMap<String,Integer>();
        Map<String,Integer> rprice = new TreeMap<String,Integer>();

        for(int i=0; i<6; i++) {
            in.readLine();
            device[i] = in.readLine();
            price[i] = Integer.parseInt(in.readLine());

            if(!result.containsKey(device[i])) {
                result.put(device[i],1);
                rprice.put(device[i],price[i]);
            }
            else {
                result.put(device[i],result.get(device[i])+1);
                if(price[i]<rprice.get(device[i])) rprice.put(device[i],price[i]);
            }
        }

        int rep = 1, max = 1;
        for(int i : new ArrayList<Integer>(result.values())) {
            if(max==i) rep++;
            if(max<i) { rep = 1; max = i; }
        }

        if(rep==1) {
            for(String i : result.keySet())
                if(max==result.get(i)) out.print(i);
        }
        else {
            int min=0;
            for(String i : rprice.keySet()) {
                if(max==result.get(i)) {
                    if(min==0) min=rprice.get(i);
                    else if(min>=rprice.get(i)) min=rprice.get(i);
                }
            }
            for(String i : rprice.keySet()) {
                if(min==rprice.get(i)) out.print(i);
            }
        }
        out.flush();
    }
}