#include <bits/stdc++.h>
using namespace std;
int main() {
   	string s;
   	cin>>s;
   	string ss;	
	for(int i=0;i<s.size();i++){
		if(s[i]>'0'&&s[i]<='9'){
			int n=s[i]-'0';
			char c=s[i-1];
			string s1= string(n-1,c);
			ss.append(s1);
		}else{
			ss.push_back(s[i]);
		}
	}
	cout<<ss<<endl;
    return 0;
}