How many games drawn with a Points difference of 31 - 33, and under 4 games lost?
CREATE TABLE "world_championship_group_c_bulgaria" (
  "games" real,
  "drawn" real,
  "lost" real,
  "points_difference" text,
  "points" real
);
SELECT SUM("drawn") FROM "world_championship_group_c_bulgaria" WHERE "points_difference"='31 - 33' AND "lost"<4;