#include<bits/stdc++.h>
using namespace std;
int main(){
    string s;
    cin >> s;
    for(int i = 0;i < s.size()-1;i++){
        if(s[i + 1] <= '9' && s[i+1] >= '0'){
            for(int j = 1;j <= (s[i+1] -'0');j++){
                cout << s[i];
            }
        }else if(s[i] > '9'|| s[i] < '0') cout << s[i];
        else continue;
    }   
    cout << endl;
}