#include <bits/stdc++.h>
using namespace std;
int32_t main() {
  long long n;
  cin >> n;
  map<string, long long> count;
  for (long long i = 0; i < n; i++) {
    string s;
    cin >> s;
    count[s]++;
  }
  string s1 = "a", s2 = "a";
  for (map<string, long long>::iterator it = count.begin(); it != count.end();
       ++it) {
    if (s1 == "a")
      s1 = (*it).first;
    else
      s2 = (*it).first;
  }
  if (count[s1] > count[s2])
    cout << s1 << "\n";
  else
    cout << s2 << "\n";
}
