new_contents: # http://codingbat.com/prob/p145834
  
  def last2(str):
    if len(str) < 2:
      return 0
      
    count = 0
    
    for i in range(len(str)-2):
      if str[i:i+2] == str[len(str)-2:]:
        count += 1
        
    return count
  
subject: Create last2.py