package timus;
import java.io.*;
import java.util.HashMap;
import java.util.Map;
import java.util.StringTokenizer;
/**
* Created by sherxon on 12/4/16.
*/
public class Penguins {
public static void main(String[] args) throws IOException {
FastReader reader=new FastReader();
int n=Integer.parseInt(reader.nextLine());
Map<String, Integer> ma= new HashMap<>();
for (int i = 0; i <n ; i++) {
String s=reader.nextLine();
if(!ma.containsKey(s))
ma.put(s, 1);
else
ma.put(s, ma.get(s)+1);
}
int max=0;
String s=null;
for (String s1 : ma.keySet()) {
if(ma.get(s1) > max){
max=ma.get(s1);
s=s1;
}
}
BufferedWriter writer= new BufferedWriter(new OutputStreamWriter(System.out));
writer.write(s);
writer.flush();
writer.close();
}
private static class FastReader {
BufferedReader bf;
StringTokenizer st;
public static void main(String[] args) {
FastReader fastReader= new FastReader();
String s=fastReader.nextLine();
String s1=fastReader.nextLine();
String s2=fastReader.next();
String s3=fastReader.next();
}
public FastReader() {
bf=new BufferedReader(new InputStreamReader(System.in));
}
String nextLine(){
String st="";
try {
st=bf.readLine();
} catch (IOException e) {
e.printStackTrace();
}
return st;
}
String next(){
while (st==null || !st.hasMoreTokens()){
try {
st= new StringTokenizer(bf.readLine());
} catch (IOException e) {
e.printStackTrace();
}
}
return st.nextToken();
}
int nextInt(){
return Integer.parseInt(next());
}
}
}