#include <iostream>
#include <string>

using namespace std;

int main() {
    int A[10]{ 0 };
    int n;
    cin >> n;
    for (int i = 0; i < n; i++) {
        string str; cin >> str;
        for (char ch : str)
            A[ch - '0']++;
    }

    int max = 0; int Mindex = 0;
    for (int i = 0; i < 10; i++)
        if (A[i] > max) {
            max = A[i];
            Mindex = i;
        }

    for (int i = 0; i < 10; i++)
        if (A[i] == max) cout << i << endl;




    return 0;
}