#include<bits/stdc++.h>
using namespace std;
char s[101],s0[101];
int n;
int main(){
cin>>n;
cin>>s0;
for (int i = 0; i < n-1; i++) {
cin>>s;
if(strcmp(s0,s)>0) {strcpy(s0,s);};
}
cout<<s0;
}
#include<bits/stdc++.h>
using namespace std;
char s[101],s0[101];
int n;
int main(){
cin>>n;
cin>>s0;
for (int i = 0; i < n-1; i++) {
cin>>s;
if(strcmp(s0,s)>0) {strcpy(s0,s);};
}
cout<<s0;
}