You can use both holes

SELECT * FROM gallery2 WHERE topic_id="290117" UNION SELECT * FROM gallery2 WHERE topic_id="1076323" UNION SELECT * FROM gallery2 WHERE topic_id="452739" UNION SELECT * FROM gallery2 WHERE topic_id="1001336" UNION SELECT * FROM gallery2 WHERE topic_id="1535906" UNION SELECT * FROM gallery2 WHERE topic_id="1100477" UNION SELECT * FROM gallery2 WHERE topic_id="1045656" UNION SELECT * FROM gallery2 WHERE topic_id="1324638" UNION SELECT * FROM gallery2 WHERE topic_id="39873" UNION SELECT * FROM gallery2 WHERE topic_id="645932" UNION SELECT * FROM gallery2 WHERE topic_id="495904" UNION SELECT * FROM gallery2 WHERE topic_id="1687542" UNION SELECT * FROM gallery2 WHERE topic_id="1362606" UNION SELECT * FROM gallery2 WHERE topic_id="774951" UNION SELECT * FROM gallery2 WHERE topic_id="396291" UNION SELECT * FROM gallery2 WHERE topic_id="1458858"