input: Write a function to extract the verbs from a given sentence and return them as a list. If the sentence is empty, return an empty list.
  assert extract_verbs("The cat jumped over the moon.")==['jumped']
  assert extract_verbs("She is running and laughing.")==['is', 'running', 'laughing']
  assert extract_verbs("He wrote the code.")==['wrote']
  assert extract_verbs("")==[]
output: def extract_verbs(sentence):
      if not sentence:
          return []
      words = sentence.split()
      verbs = [word for word in words if any(c.isalpha() and c.islower() for c in word) and word[-1] not in ".,"]
      return verbs