CREATE TABLE table_203_391 (id NUMBER, "season" CLOB, "greek league" CLOB, "greek cup" CLOB, "europe" CLOB, "coach" CLOB, "roster" CLOB)

previous to 1977 how many greek leagues were champion ?
SELECT COUNT(*) FROM table_203_391 WHERE "season" < 1977 AND "greek league" = 'champion'
SELECT COUNT(*) FROM "table_203_391" WHERE "greek league" = 'champion' AND "season" < 1977