Input (grade 12): Louis' sons (876-887) Within East Francia four stem duchies had (re -) developed: Swabia (Alamannia), Franconia (the eastern part of former Austrasia), Saxony and Bavaria.
Output (grade 9): East Francia was divided into four duchies: Swabia (Alamannia), Franconia, Saxony and Bavaria (with Carinthia).