#include <cstdio>
#include <vector>
#include <algorithm>
#include <cstring>
#include <string>
#include <cctype>
#include <sstream>
#include <cmath>
#include <climits>
#include <set>
#include <iostream>
#include <map>
#include <functional>
#include <cstdlib>
#include <numeric>
#include <queue>
#include <complex>

using namespace std;

#define reep(i,f,n) for(int i=f; i<int(n); ++i)
#define rep(i,n) reep(i,0,n)

typedef vector<int> vi;
typedef pair<int, int> pii;
typedef complex<double> Point;

int main()
{
	char str[128];
	while(scanf("%s", str) != EOF){
		rep(i, strlen(str)){
			if(str[i] == '@'){
				rep(j, str[i+1]-'0')
					putchar(str[i+2]);
				i += 2;
			}else
				putchar(str[i]);
		}
		puts("");
	}

	return 0;
}