import java.io.*;

import java.util.*;

public class Solution {

public static void main(String[] args) {

/* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution. */

Scanner sc = new Scanner(System.in);

int t = sc.nextInt();

ArrayList<String> names = new ArrayList<String>();

for (int i = 0; i < t; i++) {

String name = sc.next();

String email = sc.next();

if (email.matches("^[_A-Za-z0-9-\\+]+(\\.[_A-Za-z0-9-]+)*@gmail.com"))

names.add(name);

}

Collections.sort(names, String.CASE_INSENSITIVE_ORDER);

for (String name : names) {

System.out.println(name);

}

}

}