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