#include <fstream>

using namespace std;
ifstream f("subnumar.in");
ofstream g("subnumar.out");
long long x,q,v[100],maxim;
int main()
{
    while(f>>x)
    {
        while(x>9)
        {
            q=x%100;
            v[q]++;
            if(v[q]>maxim)
                maxim=v[q];
            x=x/10;
        }
    }
    for(int i=99; i>=10; i--)
    {
        if(v[i]==maxim)
            g<<i<<" ";
    }

    return 0;
}