CREATE TABLE table_65532 ("School" TEXT, "Location" TEXT, "Mascot" TEXT, "Enrollment" FLOAT, "IHSAA Football Class" TEXT, "County" TEXT)

Which IHSAA Football Class has a County of 77 sullivan, and a School of union dugger?
SELECT "IHSAA Football Class" FROM table_65532 WHERE "County" = '77 sullivan' AND "School" = 'union dugger'
SELECT "IHSAA Football Class" FROM "table_65532" WHERE "County" = '77 sullivan' AND "School" = 'union dugger'