#include<bits/stdc++.h>
using namespace std;
int main(){
	int n;
    cin>>n;
    string s[100],mn;
    for(int i=1;i<=n;i++){
    	cin>>s[i];
    }
    mn=s[1];
    for(int i=2;i<=n;i++){
    	if(s[i]<mn){
    		mn=s[i];
    	}
    }
    cout<<mn;
	return 0;
}

/**************************************************************
	Problem: 1480
	User: yangjunwenredianling
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2076 kb
****************************************************************/