#include<bits/stdc++.h>
using namespace std;
int n,m=0;
string s;
int main(){
	cin>>s;
	for(int i=0;i<s.size();i++){
		if(s[i]<='9'&&s[i]>='0'){
			for(int p=1;p<=s[i]-'0';p++){
				cout<<s[i+1];
			}
			i++;
		}else{
			cout<<s[i];
		}
	}
}
/**************************************************************
	Problem: 1104
	User: zhengzihao
	Language: C++
	Result: Wrong Answer
****************************************************************/