CREATE TABLE table_46842 ("Tie no" TEXT, "Home team" TEXT, "Score" TEXT, "Away team" TEXT, "Date" TEXT)

What team was the home team when Luton Town was the home team?
SELECT "Home team" FROM table_46842 WHERE "Away team" = 'luton town'
SELECT "Home team" FROM "table_46842" WHERE "Away team" = 'luton town'