#include <iostream>
#include <fstream>

using namespace std;

int main()
{
    ///ifstream cin("subnumar.in");
    ///ofstream cout("subnumar.out");
    int x,y,v[100]={},subnr, maxx;
    while(cin >> x){
        while(x>9){
            subnr=x%100;
            v[subnr]++;
            x/=10;
        }
    }

    for(int i=10;i<=99;i++){
        if(v[i]>maxx){
            maxx=v[i];
        }
    }

    for(int i=99; i>=10;i--){
        if(v[i]==maxx){
            cout<<i<<" ";
        }
    }

    return 0;
}