CREATE TABLE table_14599 ("Perfect stem" TEXT, "Future stem" TEXT, "Imperfect stem" TEXT, "Short stem" TEXT, "Meaning" TEXT)

What is the perfect stem for the word that has a future stem of emango?
SELECT "Perfect stem" FROM table_14599 WHERE "Future stem" = 'emango'
SELECT "Perfect stem" FROM "table_14599" WHERE "Future stem" = 'emango'