Basic AS

article = "happy happy Sad Happy Lost"
positive = ['happy']
negative = ['sad', 'lost']

  def aS(article, positive, negative)
     pos = 0
     neg = 0
     pos << article.downcase.split.count(positive)
     
     neg << article.downcase.split.count(negative)
     
     result = ((pos-neg)/(pos+neg))*100
     puts result
  
  end