class School:
    def __init__(self, name, location):
        self.name = name
        self.location = location


class Student:
    def __init__(self, name, age, school):
        self.name = name
        self.age = age
        self.school = school


class Teacher:
    def __init__(self, name, qualification, school):
        self.name = name
        self.qualification = qualification
        self.school = school


class Classroom:
    def __init__(self, classnumber, teacher):
        self.classnumber = classnumber
        self.teacher = teacher
        self.students = []

    def add_student(self, student):
        self.students.append(student)

    def delete_student(self, name):
        for student in self.students:
            if student.name == name:
                self.students.remove(student)