#include <iostream>
#include <string>
#include <vector>
#include <map>

using namespace std;

struct Student {
    string first_name;
    string last_name;
    char grade;
};

int main() {

    vector<Student> students;

    while (true) {
        Student new_student;
        if (!(cin >> new_student.first_name >> new_student.last_name >> new_student.grade)) break; 
        students.push_back(new_student);
    }

 
    map<char, vector<Student>> grade_map;

  
    for (const auto& student : students) {
        grade_map[student.grade].push_back(student);
    }


    for (char grade = 'A'; grade <= 'F'; ++grade) {
        cout << "Students with grade " << grade << ":" << endl;
        for (const auto& student : grade_map[grade]) {
            cout << student.first_name << " " << student.last_name << endl;
        }
        cout << endl;
    }

    return 0;
}