Codecademy Python3 Challenge: Every Other Letter

# Write your every_other_letter function here:
def every_other_letter(word):
  string = word[ : : 2]
  return string

# Uncomment these function calls to test your function:
print(every_other_letter("Codecademy"))
# should print Cdcdm
print(every_other_letter("Hello world!"))
# should print Hlowrd
print(every_other_letter(""))
# should print