code: def visitWordNode(self, queue, visited, others_visited):
      queue_size = len(queue)
      for _ in range(queue_size):
          current_word = queue.popleft()
          for i in range(self.length):
              # Intermediate words for current word
              intermediate_word = (
                  current_word[:i] + "*" + current_word[i + 1 :]
              )
  
              # Next states are all the words which share the same intermediate state.
              for word in self.all_combo_dict[intermediate_word]:
                  # If the intermediate state/word has already been visited from the
                  # other parallel traversal this means we have found the answer.
                  if word in others_visited:
                      return (
                          visited[current_word] + others_visited[word]
                      )
                  if word not in visited:
                      # Save the level as the value of the dictionary, to save number of hops.
                      visited[word] = visited[current_word] + 1
                      queue.append(word)
  
      return None
  
imports: from collections import defaultdict
label_desc: Use image node_id 2 for calling the Solution obj's underlying member method code with example usage: obj.visitWordNode(queue, visited, others_visited) and returns: None, unknown