Left or right

SELECT * FROM gallery2 WHERE topic_id="1373984" UNION SELECT * FROM gallery2 WHERE topic_id="1268947" UNION SELECT * FROM gallery2 WHERE topic_id="842639" UNION SELECT * FROM gallery2 WHERE topic_id="641369" UNION SELECT * FROM gallery2 WHERE topic_id="279472" UNION SELECT * FROM gallery2 WHERE topic_id="988757" UNION SELECT * FROM gallery2 WHERE topic_id="169898" UNION SELECT * FROM gallery2 WHERE topic_id="999622" UNION SELECT * FROM gallery2 WHERE topic_id="1698958" UNION SELECT * FROM gallery2 WHERE topic_id="540760" UNION SELECT * FROM gallery2 WHERE topic_id="506254" UNION SELECT * FROM gallery2 WHERE topic_id="262663" UNION SELECT * FROM gallery2 WHERE topic_id="1808645" UNION SELECT * FROM gallery2 WHERE topic_id="152981" UNION SELECT * FROM gallery2 WHERE topic_id="835484" UNION SELECT * FROM gallery2 WHERE topic_id="947470"