CREATE TABLE table_71378 ("Club" TEXT, "Played" 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)

Name the points against for cwmllynfell rfc
SELECT "Points against" FROM table_71378 WHERE "Club" = 'cwmllynfell rfc'
SELECT "Points against" FROM "table_71378" WHERE "Club" = 'cwmllynfell rfc'