#include<bits/stdc++.h>

using namespace std;
#define int long long
signed main(){
    string s;
    cin >> s;
    string resemble="";
    for(int i = 0;i<s.size();i++){
        resemble += s[i];
        if(s.size()%resemble.size()==0){
            string resemble2="";
            for(int i = 0;i<s.size()/resemble.size();i++){
                resemble2+=resemble;
                if(resemble2 == s){
                    cout << resemble;
                    return 0;
                }
            }
        }
    }
    cout << s;
}