input: Write a python function to extract words with length greater than or equal to a given length.
  assert extract_words_with_length_greater_equal_than("This is a sample string", 4)==['This', 'sample', 'string']
  assert extract_words_with_length_greater_equal_than("I love programming in Python", 5)==['programming', 'Python']
  assert extract_words_with_length_greater_equal_than("Short and long words", 4)==['Short', 'long', 'words']
output: def extract_words_with_length_greater_equal_than(s, length):
      return [word for word in s.split() if len(word) >= length]