//my firstr try before researching on regex
int main()
{
    string N_temp;
    getline(cin, N_temp);

    int N = stoi(ltrim(rtrim(N_temp)));
map<string,string> mp;
map<string,int> num;
    for (int N_itr = 0; N_itr < N; N_itr++) {
        string first_multiple_input_temp;
        getline(cin, first_multiple_input_temp);

        vector<string> first_multiple_input = split(rtrim(first_multiple_input_temp));

        string firstName = first_multiple_input[0];

        string emailID = first_multiple_input[1];
        bool isvalid=false;
        string m=emailID.substr(emailID.length()-10,10); 
        for(char c:emailID) {
            if (((c>='a' && c<='z') && m=="@gmail.com") ||  c=='@' || c=='.'){
                isvalid=true;
            }

                isvalid=false;
                 break;
        }
        
        
        }
        if (isvalid) {
        auto it = num.find(firstName);    
        if (it == num.end()) {
            num[firstName]=1 ;
        }
        else{
          num[firstName]+=1;
        }
        mp[firstName]=emailID;
        }
    }

for (auto it : mp) {
    for (int i=0; i<num[it.first]; i++) {
        cout<<it.first<<endl;
    }
}
    return 0;
}