CREATE TABLE table_29780 ("Game" FLOAT, "Date" TEXT, "Team" TEXT, "Score" TEXT, "High points" TEXT, "High rebounds" TEXT, "High assists" TEXT, "Location Attendance" TEXT, "Record" TEXT)

How many different items appear in the high rebounds column in game 80?
SELECT COUNT("High rebounds") FROM table_29780 WHERE "Game" = '80'
SELECT COUNT("High rebounds") FROM "table_29780" WHERE "Game" = '80'