code: def issubset(list1, list2):
      
      n = len(list1)
      for startpos in range(len(list2) - n + 1):
          if list2[startpos:startpos+n] == list1:
              return True
      return False
docs: Examples:
  
      >>> issubset([], [65, 66, 67])
      True
      >>> issubset([65], [65, 66, 67])
      True
      >>> issubset([65, 66], [65, 66, 67])
      True
      >>> issubset([65, 67], [65, 66, 67])
      False