#include <bits/stdc++.h>
using namespace std;

#define rep(i, a, b) for (ll i = a; i < b; i++)
using ll = long long;

int main(){
    string s, t;
    cin >> s;
    int n = s.size();
    char c = s[0];
    t = string(n, c);
    cout << t << endl;
}