Which Team #1 had a 1st leg of 78-78?
CREATE TABLE "first_preliminary_round" (
  "team_num1" text,
  "agg" text,
  "team_num2" text,
  "1st_leg" text,
  "2nd_leg" text
);
SELECT "team_num1" FROM "first_preliminary_round" WHERE "1st_leg"='78-78';