#include<iostream>
#include<string>
using namespace std;

int main(){

  string s;

  while(cin >> s){

  for(int i=0;i<s.size();i++){
    if(s[i] == '@'){
      for(int j=0;j<s[i+1]-'0';j++) cout << s[i+2];
      i += 2;
    }
    else cout << s[i];
  }

  cout << endl;
  }

}