#include<bits/stdc++.h>
using namespace std;
int n=0,m=0,o=0;
string s;
int main(){
	cin>>s;
	for(int i=0;i<s.size();i++){
		if(s[i]<='9'&&s[i]>='0'){
		    n=n*10+(s[i]-'0');
			if(s[i+1]<='9'&&s[i+1]>='0'){
				continue;
			}
		
			
			
		}else{
			cout<<s[i];
			continue;
		}
		for(int p=1;p<=n;p++){
				cout<<s[i+1];
		}
		n=0;
		i++;
	}
}

/**************************************************************
	Problem: 1104
	User: zhengzihao
	Language: C++
	Result: Accepted
	Time:6 ms
	Memory:2076 kb
****************************************************************/