import java.util.Arrays;

public class School {
    private String[] students;
    private String[] teachers;
    private String[] classes;
    private int studentCount;
    private int teacherCount;
    private int classCount;

    private static final int INITIAL_CAPACITY = 10;

    
    public School() {
        this.students = new String[INITIAL_CAPACITY];
        this.teachers = new String[INITIAL_CAPACITY];
        this.classes = new String[INITIAL_CAPACITY];
        this.studentCount = 0;
        this.teacherCount = 0;
        this.classCount = 0;
    }

   
    public void addStudent(String student) {
        if (studentCount < students.length) {
            students[studentCount++] = student;
        } else {
            System.out.println("Cannot add more students, array is full.");
        }
    }

   
    public void removeStudent(String student) {
        for (int i = 0; i < studentCount; i++) {
            if (students[i].equals(student)) {
                for (int j = i; j < studentCount - 1; j++) {
                    students[j] = students[j + 1];
                }
                students[--studentCount] = null;
                return;
            }
        }
        System.out.println("Student not found.");
    }

   
    public void addTeacher(String teacher) {
        if (teacherCount < teachers.length) {
            teachers[teacherCount++] = teacher;
        } else {
            System.out.println("Cannot add more teachers, array is full.");
        }
    }

    
    public void removeTeacher(String teacher) {
        for (int i = 0; i < teacherCount; i++) {
            if (teachers[i].equals(teacher)) {
                for (int j = i; j < teacherCount - 1; j++) {
                    teachers[j] = teachers[j + 1];
                }
                teachers[--teacherCount] = null;
                return;
            }
        }
        System.out.println("Teacher not found.");
    }

  
    public void createClass(String newClass) {
        if (classCount < classes.length) {
            classes[classCount++] = newClass;
        } else {
            System.out.println("Cannot add more classes, array is full.");
        }
    }

  
    public void printStudents() {
        System.out.println("Students:");
        for (int i = 0; i < studentCount; i++) {
            System.out.println("- " + students[i]);
        }
    }

    
    public void printTeachers() {
        System.out.println("Teachers:");
        for (int i = 0; i < teacherCount; i++) {
            System.out.println("- " + teachers[i]);
        }
    }

   
    public void printClasses() {
        System.out.println("Classes:");
        for (int i = 0; i < classCount; i++) {
            System.out.println("- " + classes[i]);
        }
    }

    
    public static void main(String[] args) {
        
        School school = new School();

     
        school.addStudent("Alice");
        school.addStudent("Bob");
        school.addStudent("Charlie");

        
        school.addTeacher("Mr. Smith");
        school.addTeacher("Ms. Johnson");

        
        school.createClass("Math 101");
        school.createClass("Science 102");

       
        school.printStudents();
        school.printTeachers();
        school.printClasses();

        
        school.removeStudent("Bob");
        school.removeTeacher("Ms. Johnson");

       
        System.out.println("\nAfter removal:");
        school.printStudents();
        school.printTeachers();
        school.printClasses();
    }
}