#include <iostream>
#include <cstring>

using namespace std;

int main(){
    string s,res;
    cin>>s;
    for (int i =0;i<s.size();i++){
        if(i+1<s.size()&&s[i+1]<='9')
        {
            int k = s[i+1] - '0';
            while(k--) res+=s[i];
            i++;
        }
        else
        {
            res+=s[i];
        }

    }
    cout<<res<<endl;

}