CREATE TABLE table_17815 ("Club" TEXT, "Played" TEXT, "Won" TEXT, "Drawn" TEXT, "Lost" TEXT, "Points for" TEXT, "Points against" TEXT, "Tries for" TEXT, "Tries against" TEXT, "Try bonus" TEXT, "Losing bonus" TEXT, "Points" TEXT)

what amount of points were lost by 13?
SELECT "Points" FROM table_17815 WHERE "Lost" = '13'
SELECT "Points" FROM "table_17815" WHERE "Lost" = '13'