CREATE TABLE table_204_654 (id DECIMAL, "year" DECIMAL, "song" TEXT, "u.s." DECIMAL, "u.s.\ r&b" DECIMAL, "u.s.\ ac" DECIMAL, "uk" DECIMAL, "album" TEXT)

which songs charted in the united states , but not the uk ?
SELECT "song" FROM table_204_654 WHERE NOT "u.s." IS NULL AND "uk" IS NULL
SELECT "song" FROM "table_204_654" WHERE "uk" IS NULL AND NOT "u.s." IS NULL