What's the mascot of Eastern Pekin having less than 627 enrolled and an AA for their IHSAA Class?
CREATE TABLE "indiana_high_school_athletics_conference" (
  "school" text,
  "location" text,
  "mascot" text,
  "enrollment" real,
  "ihsaa_class" text,
  "num_county" text
);
SELECT "mascot" FROM "indiana_high_school_athletics_conference" WHERE "enrollment"<627 AND "ihsaa_class"='aa' AND "school"='eastern pekin';