What is the IHSAA class of the school with less than 400 students and a mascot of the Tigers?
CREATE TABLE "indiana_high_school_athletics_conference" (
  "school" text,
  "location" text,
  "mascot" text,
  "size" real,
  "ihsaa_class" text,
  "ihsaa_football_class" text,
  "county" text
);
SELECT "ihsaa_class" FROM "indiana_high_school_athletics_conference" WHERE "size"<400 AND "mascot"='tigers';