CREATE TABLE table_23887 ("Club" TEXT, "Played" TEXT, "Won" TEXT, "Drawn" TEXT, "Lost" TEXT, "Points for" TEXT, "Points against" TEXT, "Points difference" TEXT, "Bonus Points" TEXT, "Points" TEXT)

How many of the points difference lost equal 10?
SELECT "Points difference" FROM table_23887 WHERE "Lost" = '10'
SELECT "Points difference" FROM "table_23887" WHERE "Lost" = '10'