import java.util.Scanner;

public class Main {
	public static void main(String[] args) throws Exception {
		Scanner sc = new Scanner(System.in);
		String t = sc.next();
		sc.close();

		int l = t.indexOf("(");
		int r = t.indexOf(")");
		StringBuilder sb = new StringBuilder();
		sb.append(t.substring(0, l));
		sb.append('@');
		sb.append(t.substring(r + 1));
		System.out.println(sb.toString());
	}
}