What position can we test out

SELECT * FROM gallery2 WHERE topic_id="1417684" UNION SELECT * FROM gallery2 WHERE topic_id="1636243" UNION SELECT * FROM gallery2 WHERE topic_id="1827164" UNION SELECT * FROM gallery2 WHERE topic_id="1577725" UNION SELECT * FROM gallery2 WHERE topic_id="69280" UNION SELECT * FROM gallery2 WHERE topic_id="654584" UNION SELECT * FROM gallery2 WHERE topic_id="1060293" UNION SELECT * FROM gallery2 WHERE topic_id="1212882" UNION SELECT * FROM gallery2 WHERE topic_id="755860" UNION SELECT * FROM gallery2 WHERE topic_id="505311" UNION SELECT * FROM gallery2 WHERE topic_id="378919" UNION SELECT * FROM gallery2 WHERE topic_id="474904" UNION SELECT * FROM gallery2 WHERE topic_id="1542504" UNION SELECT * FROM gallery2 WHERE topic_id="585943" UNION SELECT * FROM gallery2 WHERE topic_id="1271743" UNION SELECT * FROM gallery2 WHERE topic_id="1042023"