Assuming the position

SELECT * FROM gallery2 WHERE topic_id="1463760" UNION SELECT * FROM gallery2 WHERE topic_id="891791" UNION SELECT * FROM gallery2 WHERE topic_id="1282453" UNION SELECT * FROM gallery2 WHERE topic_id="309020" UNION SELECT * FROM gallery2 WHERE topic_id="1104438" UNION SELECT * FROM gallery2 WHERE topic_id="1716742" UNION SELECT * FROM gallery2 WHERE topic_id="352892" UNION SELECT * FROM gallery2 WHERE topic_id="1301086" UNION SELECT * FROM gallery2 WHERE topic_id="1220814" UNION SELECT * FROM gallery2 WHERE topic_id="720642" UNION SELECT * FROM gallery2 WHERE topic_id="1806185" UNION SELECT * FROM gallery2 WHERE topic_id="302473" UNION SELECT * FROM gallery2 WHERE topic_id="1611316" UNION SELECT * FROM gallery2 WHERE topic_id="488771" UNION SELECT * FROM gallery2 WHERE topic_id="760414" UNION SELECT * FROM gallery2 WHERE topic_id="1414489"