input: Write a python function to print each word in a list of strings.
  assert print_each_word(['apple', 'banana', 'cherry'])==None
  assert print_each_word(['dog', 'elephant', 'frog'])==None
  assert print_each_word(['python', 'java', 'c++'])==None
output: def print_each_word(words):
      for word in words:
          print(word)