Maybe fit 4

SELECT * FROM gallery2 WHERE topic_id="1346554" UNION SELECT * FROM gallery2 WHERE topic_id="316659" UNION SELECT * FROM gallery2 WHERE topic_id="302933" UNION SELECT * FROM gallery2 WHERE topic_id="766951" UNION SELECT * FROM gallery2 WHERE topic_id="1282362" UNION SELECT * FROM gallery2 WHERE topic_id="751489" UNION SELECT * FROM gallery2 WHERE topic_id="1512604" UNION SELECT * FROM gallery2 WHERE topic_id="842918" UNION SELECT * FROM gallery2 WHERE topic_id="587413" UNION SELECT * FROM gallery2 WHERE topic_id="1725093" UNION SELECT * FROM gallery2 WHERE topic_id="24676" UNION SELECT * FROM gallery2 WHERE topic_id="1671583" UNION SELECT * FROM gallery2 WHERE topic_id="1506286" UNION SELECT * FROM gallery2 WHERE topic_id="1036880" UNION SELECT * FROM gallery2 WHERE topic_id="152704" UNION SELECT * FROM gallery2 WHERE topic_id="1270759"