{"ast_node_type":"other","tokens":[{"end":99,"kind":"keyword","start":0,"text":"(ConfusionType::DigitLetter,"}]}
            (ConfusionType::DigitLetter, ConfusionType::DigitLetter) => ConfusionType::DigitLetter,
            (ConfusionType::Case, ConfusionType::Case) => ConfusionType::Case,
        }