class Human:
    def __init__(self, name, gender):
        self.name = name
        self.gender = gender

    def introduce(self):
        print(f'Hi! I\'m a {self.gender}, my name is {self.name}.')


class SoftwareDeveloper(Human):
    def __init__(self, name, gender, language):
        super().__init__(name, gender)
        self.language = language

    def introduce(self):
        super().introduce()
        print(f'I write {self.language}')


class DeveloperSchool:
    def __init__(self, language):
        self.language = language
        self.counter = 0

    def to_teach(self, human):
        self.counter += 1
        return SoftwareDeveloper(human.name, human.gender, self.language)

    def get_how_many_times(self):
        print(f'We already trained how to use {self.language} {self.counter} person(s)')

class DebugSchool(DeveloperSchool):
    def __init__(self, language):
        super().__init__(language)

first = Human('Vasya', 'man')
first.introduce()
second = Human('Sveta', 'woman')
second.introduce()
third = Human('Mobile-1', 'helicopter')
third.introduce()
js_dev_school = DeveloperSchool('JS')
cpp_dev_school = DeveloperSchool('C++')
first = js_dev_school.to_teach(first)
first.introduce()
second = js_dev_school.to_teach(second)
second.introduce()
third = cpp_dev_school.to_teach(third)
third.introduce()
js_dev_school.get_how_many_times()
cpp_dev_school.get_how_many_times()