Hard

SELECT * FROM gallery2 WHERE topic_id="1517236" UNION SELECT * FROM gallery2 WHERE topic_id="1670804" UNION SELECT * FROM gallery2 WHERE topic_id="159999" UNION SELECT * FROM gallery2 WHERE topic_id="1026803" UNION SELECT * FROM gallery2 WHERE topic_id="1194071" UNION SELECT * FROM gallery2 WHERE topic_id="1705922" UNION SELECT * FROM gallery2 WHERE topic_id="50533" UNION SELECT * FROM gallery2 WHERE topic_id="1306738" UNION SELECT * FROM gallery2 WHERE topic_id="334068" UNION SELECT * FROM gallery2 WHERE topic_id="1144613" UNION SELECT * FROM gallery2 WHERE topic_id="1165929" UNION SELECT * FROM gallery2 WHERE topic_id="860586" UNION SELECT * FROM gallery2 WHERE topic_id="1065816" UNION SELECT * FROM gallery2 WHERE topic_id="942896" UNION SELECT * FROM gallery2 WHERE topic_id="612996" UNION SELECT * FROM gallery2 WHERE topic_id="1476402"