code: def generatePossibleNextMoves(self, s):
      """
      :type s: str
      :rtype: List[str]
      """
      # return [s[:i] + "--" + s[i+2:] for i in range(len(s) - 1) if s[i] == s[i + 1] == "+"]
      res = []
      if s is None or len(s) == 0:
          return res
      ls = len(s)
      for i in range(ls - 1):
          if s[i] == "+" and s[i + 1] == "+":
              res.append(s[:i] + "--" + s[i + 2 :])
      return res
  
label_desc: Use image node_id 1 for calling the Solution obj's underlying member method code with example usage: obj.generatePossibleNextMoves(s) and returns: res, res