where would you offload first

SELECT * FROM gallery2 WHERE topic_id="1215537" UNION SELECT * FROM gallery2 WHERE topic_id="50205" UNION SELECT * FROM gallery2 WHERE topic_id="993769" UNION SELECT * FROM gallery2 WHERE topic_id="1782655" UNION SELECT * FROM gallery2 WHERE topic_id="782535" UNION SELECT * FROM gallery2 WHERE topic_id="570599" UNION SELECT * FROM gallery2 WHERE topic_id="817801" UNION SELECT * FROM gallery2 WHERE topic_id="1320088" UNION SELECT * FROM gallery2 WHERE topic_id="1153669" UNION SELECT * FROM gallery2 WHERE topic_id="867123" UNION SELECT * FROM gallery2 WHERE topic_id="150274" UNION SELECT * FROM gallery2 WHERE topic_id="1769069" UNION SELECT * FROM gallery2 WHERE topic_id="963202" UNION SELECT * FROM gallery2 WHERE topic_id="612117" UNION SELECT * FROM gallery2 WHERE topic_id="752461" UNION SELECT * FROM gallery2 WHERE topic_id="1804618"