Same, I had to look to see what the intended answer was. In fairness though, GPT4 was objectively incorrect, it's not even internally consistent or coherent -

Same, I had to look to see what the intended answer was. In fairness though, GPT4 was objectively incorrect, it's not even internally consistent or coherent - it either thinks b & h are vowels, or that lamb and squash don't end in those letters, or has changed its mind about the rule mid-sentence, or something.