CREATE TABLE table_42917 ("m\\u00e5cha" TEXT, "indicative" TEXT, "imperative" TEXT, "subjunctive" TEXT, "inverse subjunctive" TEXT)

What inverse subjunctive has as the imperative and a subjunctive of se m chadn?
SELECT "inverse subjunctive" FROM table_42917 WHERE "imperative" = '—' AND "subjunctive" = 'se måchadn'
SELECT "inverse subjunctive" FROM "table_42917" WHERE "imperative" = '—' AND "subjunctive" = 'se måchadn'