This should be illegal: https://wcjohnson.github.io/lscdiag/?v=1&s=eMOafU_DiwrDgkAMw7zClcKSwpNCD0XDmQrCvVjDsMOuD8OUIsOpNsOVw5XDtMOBPkApw7XDm8ONwopXw40lwq_CmcOJZMKGw448fMKww6TCoMKYw6HDnMOjFHNZw7bDpMKxRcKPwrHDkzfClcKrw4nDrFQmwrE1wrnDmsKow6vDtMOkwrvCgsOCw5tAS8O6DzHCgxvCg8OVFCt2GgrDgFfCk8OswpPClV7CnwYQbjBxw6XCsREHVcKWZnUKwo7CmMK0wqfDtjjCtsOCGwJzwrwxDsKdwrl8w7zCjMO9ZMKYwqxoMXpyHlLDqAjCv19Uw6DCsMKjAzJDwr0sQmQjCBnDvzYpwrg3woBxVHc# ```js a~b ? (c) ```