#include<bits/stdc++.h>
using namespace std;
char s[1010][1010];
string b;
int n,ans;
int main()
{
	cin >> n;
	for(int i = 1;i <= n; i++)
	{
		cin >> s[i];
		for(int j = 0;j < strlen(s[i]); j++)
		{
			if(s[i][j] >= 'A' and s[i][j] <= 'Z')
			{
				s[i][j] -= 'a' + 1;
			}
		}
	}
	for(int i = 1;i <= n; i++)
	{
		int sum = ans;
		ans = 0;
		for(int j = 1;j <= n; j++)
		{		
			if(s[i] == s[j])
			{
				ans++;
			}
		}
		if(ans >= sum)
		{
			b = s[i];
		}
	}
	cout << b;
}

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