 Which Free polite has a Genitive 1 of *=ku?
CREATE TABLE table_40797 (
    "Free" text,
    "Free polite" text,
    "Genitive 1" text,
    "Genitive 2" text,
    "Genitive 3" text
)
SELECT "Free polite" FROM table_40797 WHERE "Genitive 1" = '*=ku'