I think the instructions are simple , just put your head between them

SELECT * FROM gallery2 WHERE topic_id="1567766" UNION SELECT * FROM gallery2 WHERE topic_id="1632171" UNION SELECT * FROM gallery2 WHERE topic_id="1160341" UNION SELECT * FROM gallery2 WHERE topic_id="1572121" UNION SELECT * FROM gallery2 WHERE topic_id="1222754" UNION SELECT * FROM gallery2 WHERE topic_id="329383" UNION SELECT * FROM gallery2 WHERE topic_id="346035" UNION SELECT * FROM gallery2 WHERE topic_id="966598" UNION SELECT * FROM gallery2 WHERE topic_id="420240" UNION SELECT * FROM gallery2 WHERE topic_id="1777201" UNION SELECT * FROM gallery2 WHERE topic_id="349606" UNION SELECT * FROM gallery2 WHERE topic_id="34887" UNION SELECT * FROM gallery2 WHERE topic_id="1691685" UNION SELECT * FROM gallery2 WHERE topic_id="662974" UNION SELECT * FROM gallery2 WHERE topic_id="1042870" UNION SELECT * FROM gallery2 WHERE topic_id="296082"