#include <iostream>
#include <string>
#include <vector>
using namespace std;
 
int main() {
    vector<string> Slytherin, Hufflepuff, Gryffindor, Ravenclaw;
    int n;
    (cin >> n).get();
    for (int i = 0; i < n; i++)
    {
        string s, s1;
        getline (cin, s);
        (cin >> s1).get();
    //  cout << s << endl << s1 << endl;
        if (s1 == "Slytherin") Slytherin.push_back(s);
        else if (s1 =="Hufflepuff") Hufflepuff.push_back(s);
        else if (s1 =="Gryffindor") Gryffindor.push_back(s);
        else if (s1 =="Ravenclaw") Ravenclaw.push_back(s);
    }
    cout << endl << endl;
    if (Slytherin.size()>0)
    {
        cout << "Slytherin:" << endl;
        for (int i = 0; i < Slytherin.size(); i++)
            cout << Slytherin[i] << endl;
    }
    if (Hufflepuff.size()>0)
    {
        cout<< endl << "Hufflepuff:" << endl;
        for (int i = 0; i < Hufflepuff.size(); i++)
            cout << Hufflepuff[i] << endl;
    }
    if (Gryffindor.size()>0)
    {
        cout<< endl << "Gryffindor:" << endl;
        for (int i = 0; i < Gryffindor.size(); i++)
            cout << Gryffindor[i] << endl;
    }
    if (Ravenclaw.size()>0)
    {
        cout<< endl << "Ravenclaw:" << endl;
        for (int i = 0; i < Ravenclaw.size(); i++)
            cout << Ravenclaw[i] << endl;
    }
 
    cin.get();
    return 0;
}

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7
 Ivan Ivanov
 Gryffindor
 Mac Go Nagolo
 Hufflepuff
 Zlobeus Zlei
 Slytherin
 Um Bridge
 Slytherin
 Tatiana Henrihovna Grotter
 Ravenclaw
 Garry Potnyj
 Gryffindor
 Herr Mionag-Ranger
 Gryffindor