#include<bits/stdc++.h>
using namespace std;
map<string,int> a;
int n;
string s;
int main()
{
	cin>>n;
	for(int i=1;i<=n;i++)
	{
		cin>>s;
		if(a.count(s)==0)
		{
			a[s]=1;
		}else a[s]++;
		
	}
	map<string,int>::iterator it=a.begin();
	cout<<it->first;
	return 0;
}

/**************************************************************
	Problem: 1760
	User: admin
	Language: C++
	Result: Accepted
	Time:5 ms
	Memory:2084 kb
****************************************************************/