#include <cstdio>
#include <iostream>
#include <string>
using namespace std;
int main() {
	string s;
	while(cin >> s) {
		for(unsigned 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;
	}
}