You can start by sliding your hand in (and grab one of two options in comments)

SELECT * FROM gallery2 WHERE topic_id="902612" UNION SELECT * FROM gallery2 WHERE topic_id="1715842" UNION SELECT * FROM gallery2 WHERE topic_id="1183197" UNION SELECT * FROM gallery2 WHERE topic_id="595112" UNION SELECT * FROM gallery2 WHERE topic_id="580368" UNION SELECT * FROM gallery2 WHERE topic_id="1001312" UNION SELECT * FROM gallery2 WHERE topic_id="369711" UNION SELECT * FROM gallery2 WHERE topic_id="362419" UNION SELECT * FROM gallery2 WHERE topic_id="1522862" UNION SELECT * FROM gallery2 WHERE topic_id="934652" UNION SELECT * FROM gallery2 WHERE topic_id="1052157" UNION SELECT * FROM gallery2 WHERE topic_id="783786" UNION SELECT * FROM gallery2 WHERE topic_id="1524310" UNION SELECT * FROM gallery2 WHERE topic_id="897925" UNION SELECT * FROM gallery2 WHERE topic_id="34349" UNION SELECT * FROM gallery2 WHERE topic_id="443913"