code: def is_strobogrammatic(num):
      
      comb = "00 11 88 69 96"
      i = 0
      j = len(num) - 1
      while i <= j:
          x = comb.find(num[i]+num[j])
          if x == -1:
              return False
          i += 1
          j -= 1
      return True
docs: :type num: str
      :rtype: bool