# fn_switchcase.py

# fn_switchcase.py

def cat_sound():
    return "Meow"

def dog_sound():
    return "Woof"

def cow_sound():
    return "Moo"

def unknown_sound():
    return "*** Unlisted ***"

def animal_sound(animal):
    sounds = {
        "cat": cat_sound,
        "dog": dog_sound,
        "cow": cow_sound
    }
    return sounds.get(animal, unknown_sound)()

# Test the function
for animal in 'cat dog cow sloth'.split():
    print(animal_sound(animal))