#include <bits/stdc++.h>
#define ll long long
using namespace std;

void Z()
{
    map<string,int> a;
    int n;
    cin >> n;
    for (int i = 0;i < n;i ++)
    {
        string s;
        cin >> s;
        a[s] ++;
    }
    int mx = 0;
    string ans;
    for (auto [x, y]:a)
    {
        if (y > mx)
        {
            mx = y;
            ans = x;
        }
    }
    if (mx > n / 2)
    {
        cout << ans;
    }
    else
    {
        cout << "uh-oh";
    }
}

int main()
{
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    int t = 1;
    //cin >> t;
    while (t--)
    {
        Z();
    }
    return 0;
}