What is the highest value in April with a record of 35–37–11 and more than 81 points?
CREATE TABLE "regular_season" (
  "game" real,
  "april" real,
  "opponent" text,
  "score" text,
  "record" text,
  "points" real
);
SELECT MAX("april") FROM "regular_season" WHERE "record"='35–37–11' AND "points">81;