ol_5_09

#include <iostream>
#include <fstream>
#include <vector>
#include <utility>

using namespace std;

int main()
{
    ifstream cin("input.txt");

    vector <char> word;
    vector <pair <int, char> > c;

    char cur;
    while(cin>>cur)
    {
        bool is = false;
        for(int i = 0; i < c.size(); i++)
            if(cur == c[i].second)
            {
                is = true;
                c[i].first++;
            }
        if(!is)
        {
            c.resize(c.size()+1);
            c[c.size()-1].first = 0;
            c[c.size()-1].second = cur;
        }
        word.push_back(cur);
    }
    int mx = 0, mxi = 0;
    for(int i = 0; i < c.size(); i++)
        if(c[i].first >= mx)
        {
            mx = c[i].first;
            mxi = i;
        }
    //for(int i = 0; i < c.size(); i++)
      //  cout<<c[i].second<<':'<<c[i].first<<'\n'; //check each char's quantity

    for(int i = 0; i < word.size(); i++)
        if(word[i] != c[mxi].second)
            cout<<word[i];
}