I pick right [3]

SELECT * FROM gallery2 WHERE topic_id="550813" UNION SELECT * FROM gallery2 WHERE topic_id="1684913" UNION SELECT * FROM gallery2 WHERE topic_id="1440455" UNION SELECT * FROM gallery2 WHERE topic_id="330364" UNION SELECT * FROM gallery2 WHERE topic_id="1814448" UNION SELECT * FROM gallery2 WHERE topic_id="668057" UNION SELECT * FROM gallery2 WHERE topic_id="65340" UNION SELECT * FROM gallery2 WHERE topic_id="504772" UNION SELECT * FROM gallery2 WHERE topic_id="1005927" UNION SELECT * FROM gallery2 WHERE topic_id="1250749" UNION SELECT * FROM gallery2 WHERE topic_id="185320" UNION SELECT * FROM gallery2 WHERE topic_id="1252490" UNION SELECT * FROM gallery2 WHERE topic_id="1661755" UNION SELECT * FROM gallery2 WHERE topic_id="1353998" UNION SELECT * FROM gallery2 WHERE topic_id="1649191" UNION SELECT * FROM gallery2 WHERE topic_id="1364168"