jsYjm7pL

16
2DEVELOPER.@gmail.com
3t+es+ter@GMAIL.COM
4T@bmail.com
5a@gmail.com.ru
6D.eveloper@Gmail.Com
7a+b@gmail.com.ru
8	
95
101 a@gmail.com.ru
111 t+es+ter@GMAIL.COM
122 DEVELOPER.@gmail.com D.eveloper@Gmail.Com
131 a+b@gmail.com.ru
141 T@bmail.com
15	
16import java.util.HashMap;
17import java.util.Map;
18import java.util.Scanner;
19
20public class Mails {
21
22public static void main(String[] args) {
23    Map<String, String> map = new HashMap<>();
24    Scanner sc = new Scanner(System.in);
25    int n = Integer.parseInt(sc.nextLine());
26    for (int i = 0; i < n; i++) {
27        String str1 = sc.nextLine();
28        String str2 = str1.toLowerCase();
29        String[] arr1 = str2.split("@");
30        if (arr1[1].equals("gmail.com")) {
31            str2 = arr1[0].replace(".", "") + "@gmail.com";
32            if (str2.contains("+")) {
33                String[] arr2 = str2.split("\+");
34                str2 = arr2[0] + "@gmail.com";
35            }
36        }
37        if (map.containsKey(str2)) {
38            String value = map.get(str2);
39            map.put(str2, value + " " + str1);
40        }
41        else {
42            map.put(str2, str1);
43        }
44    }
45    System.out.println(map.size());
46    for (String value: map.values()) {
47        int count = value.split(" ").length;
48        System.out.println(count + " " + value);
49    }
50}
51}