CREATE TABLE table_204_500 (id DECIMAL, "year" DECIMAL, "title" TEXT, "peak chart positions\ us country" DECIMAL, "peak chart positions\ us" DECIMAL, "album" TEXT)

tell me a song that was released in 1955 but was not on after dark .
SELECT "title" FROM table_204_500 WHERE "year" = 1955 AND "album" <> 'after dark'
SELECT "title" FROM "table_204_500" WHERE "album" <> 'after dark' AND "year" = 1955