Hard

SELECT * FROM gallery2 WHERE topic_id="678861" UNION SELECT * FROM gallery2 WHERE topic_id="292749" UNION SELECT * FROM gallery2 WHERE topic_id="1499710" UNION SELECT * FROM gallery2 WHERE topic_id="519214" UNION SELECT * FROM gallery2 WHERE topic_id="92165" UNION SELECT * FROM gallery2 WHERE topic_id="1756050" UNION SELECT * FROM gallery2 WHERE topic_id="201661" UNION SELECT * FROM gallery2 WHERE topic_id="1774790" UNION SELECT * FROM gallery2 WHERE topic_id="1318059" UNION SELECT * FROM gallery2 WHERE topic_id="304562" UNION SELECT * FROM gallery2 WHERE topic_id="666871" UNION SELECT * FROM gallery2 WHERE topic_id="1353177" UNION SELECT * FROM gallery2 WHERE topic_id="636641" UNION SELECT * FROM gallery2 WHERE topic_id="1612056" UNION SELECT * FROM gallery2 WHERE topic_id="23918" UNION SELECT * FROM gallery2 WHERE topic_id="956048"