Good morning :)

SELECT * FROM gallery2 WHERE topic_id="1535856" UNION SELECT * FROM gallery2 WHERE topic_id="857535" UNION SELECT * FROM gallery2 WHERE topic_id="1353182" UNION SELECT * FROM gallery2 WHERE topic_id="169724" UNION SELECT * FROM gallery2 WHERE topic_id="1056872" UNION SELECT * FROM gallery2 WHERE topic_id="1795249" UNION SELECT * FROM gallery2 WHERE topic_id="1577665" UNION SELECT * FROM gallery2 WHERE topic_id="1370605" UNION SELECT * FROM gallery2 WHERE topic_id="939861" UNION SELECT * FROM gallery2 WHERE topic_id="215923" UNION SELECT * FROM gallery2 WHERE topic_id="773578" UNION SELECT * FROM gallery2 WHERE topic_id="1457163" UNION SELECT * FROM gallery2 WHERE topic_id="1579261" UNION SELECT * FROM gallery2 WHERE topic_id="785852" UNION SELECT * FROM gallery2 WHERE topic_id="1079227" UNION SELECT * FROM gallery2 WHERE topic_id="1200586"