Input (grade 13): From the union of Geb and Nut came, among others, the most popular of Egyptian goddesses, Isis, the mother of Horus, whose story is central to that of her brother-husband, the resurrection god Osiris.
Output (grade 6): Nut was the sister and wife of Geb, and the mother of Isis, Osiris, Nephthys, Horus and Seth.