#include<iostream>
#include<vector>
#include<string>
using namespace std;
class Person
{
    public:
    string name;
    virtual void dispaly()=0;
};
class Student:public Person
{
    public:
    int grade;
    Student(string n,int g)
    {
        name=n;
        grade=g;
    }
    void display() override 
    {
        cout<<"Student "<<name<<", Grade "<<grade<<endl;
    }
};
class Teacher:public Person
{
    public:
    string subject;
    Teacher(string n,string s)
    {
        name=n;
        subject=s;
    }
    void display() override
    {
        cout<<"Teacher: "<<name<<", Subject "<<subject<<endl;
    }
};
int main()
{
    int N;
    cin>>N;
    vector<Person*>people;
    for(int i=0;i<N;i++)
    {
        string type;
        cin>>type;
    }
    if (type=="Student")
    {
        string name;
        int grade;
        cin>>name>>grade;
        if (grade<0)
        {
            cout<<"Invalid input"<<endl;
            return 0;
        }
        people.push_back(new Student(name,grade));
    }
    else if (type=="Teacher")
    {
        string name,subject;
        cin>>name>>subject;
        people.push_back(new Teacher(name,subject));
    }
    else
    {
        cout<<"Invalid input"<<endl;
        return 0;
    }
    for (auto p:people)
    {
        p->display();
    }
    for (auto p:people)
    {
        delete p;
    }
    return 0;
}