 class User: def __init__(self, f_name, l_name, age):     self.f_name = f_name     self.l_name = l_name     self.age = age  def describe(self):     print(f"The user {self.f_name} {self.l_name} has {self.age} years old person.")  def greet(self):     print(f"Hi {self.f_name}, you are 