This is a question that ChatGPT is incapable of answering. Remember, all these LLMs are doing are predicting what the next word in the response should be given how it has seen words put together in all of the material it has been fed. It has ZERO understanding of ANYTHING. It has no idea what it means to count characters or have any mechanism to do so.
When you tell it that it is wrong (or question it's earlier response), all it does is generate a new random vector that chooses which of the possible words it considers more or less likely, since the prior vector didn't make you happy.
ChatGPT confirms:


