left or right

SELECT * FROM gallery2 WHERE topic_id="1516564" UNION SELECT * FROM gallery2 WHERE topic_id="1518755" UNION SELECT * FROM gallery2 WHERE topic_id="223557" UNION SELECT * FROM gallery2 WHERE topic_id="291397" UNION SELECT * FROM gallery2 WHERE topic_id="1479151" UNION SELECT * FROM gallery2 WHERE topic_id="777539" UNION SELECT * FROM gallery2 WHERE topic_id="630867" UNION SELECT * FROM gallery2 WHERE topic_id="1497042" UNION SELECT * FROM gallery2 WHERE topic_id="636861" UNION SELECT * FROM gallery2 WHERE topic_id="1164080" UNION SELECT * FROM gallery2 WHERE topic_id="1186364" UNION SELECT * FROM gallery2 WHERE topic_id="204951" UNION SELECT * FROM gallery2 WHERE topic_id="1304484" UNION SELECT * FROM gallery2 WHERE topic_id="1323033" UNION SELECT * FROM gallery2 WHERE topic_id="1773047" UNION SELECT * FROM gallery2 WHERE topic_id="1796017"