class R:
    def __init__(self, name, department, age):
        self.name = name
        self.department = department
        self.age = age
    def __repr__(self):
        return f'Record({self.name},{self.department},{self.age})'

def __main__(RS,ds,ages,names):
    for i in range(50):
        RS.append(R(names[i%5],ds[i%3],ages[i%17]))

    print(RS)
    RS.sort(key=lambda l: l.age)
    print(RS)
    RS.sort(key=lambda l: l.department)
    print(RS)
    RS.sort(key=lambda l: l.age, reverse=True)
    print(RS)

__main__([], ['Engineering', 'Sales', 'Management'], [n for n in range(30,47)], ['Bob','Dan','Eric','Sue','Tina'])