#include <bits/stdc++.h>
using namespace std;

char s[1010];
char ch;
int main(){
  int i = 0;
  while((ch = getchar()) != '\n'){
    if((ch <= 'Z' && ch >= 'A') || (ch <= 'z' && ch >= 'a')){
      s[i] = ch;
      i++;
    } 
    if(ch <= '9' && ch >= '0'){
      for(int j = 1; j <= ch - '1'; j++){
        s[i] = s[i - 1];
        i++;
      }
    }
  }
  cout<<s;
  return 0;
}