# Write your reverse_string function here:
def reverse_string(word):
  reverse = word[ : : -1]
  return reverse
# Uncomment these function calls to test your  function:
print(reverse_string("Codecademy"))
# should print ymedacedoC
print(reverse_string("Hello world!"))
# should print !dlrow olleH
print(reverse_string(""))
# should print