CREATE TABLE table_44486 ("Team" TEXT, "Tries for" TEXT, "Tries against" TEXT, "Try diff" TEXT, "Points for" TEXT, "Points against" TEXT, "Points diff" TEXT)

What is Tries Against, when Tries For is 21?
SELECT "Tries against" FROM table_44486 WHERE "Tries for" = '21'
SELECT "Tries against" FROM "table_44486" WHERE "Tries for" = '21'