#include <bits/stdc++.h>
using namespace std;
int main(){
	string a,b;
	cin>>a;
	for(int i=0;i<a.length();++i){
		if(a[i]>='a'&&a[i]<='z'){
			cout<<a[i];
			if(!(a[i+1]>='a'&&a[i+1]<='z')){
				for(int j=1;j<a[i+1]-'0';++j){
					cout<<a[i];
				}
			}
		}
	}
}