#include <iostream>
using namespace std;
int main(){
    string s;
    cin >> s;
    char now;
    int i = 0;
    while(i < s.size()){
        now = s[i];
        if(i + 1 < s.size() && s[i + 1] <= '9' && s[i + 1] >= '0'){
            int amount = s[i + 1] - '0';
            for(int j = 0; j < amount; j ++ )   cout << now;
            i += 2;
        }else{
            cout << now;
            i ++ ;
        }
    }
    return 0;
}