"""Solution 6.3.2 — Same behavior, different types

Chapter 6: Objects — Everyday Programming

Bug type: Runtime

greet calls animal.speka(), but both classes provide speak, not speka,
so every call raises an AttributeError. Correcting the method name to
animal.speak() lets duck typing work for any object that can speak.

Exercise: ex_6_3_2.py
"""

class Cat:
    def speak(self):
        return "Meow"

class Cow:
    def speak(self):
        return "Moo"

def greet(animal):
    print("The animal says:", animal.speak())

greet(Cat())
greet(Cow())   # The animal says: Moo