what's happening 1st [f]🙃

SELECT * FROM gallery2 WHERE topic_id="405149" UNION SELECT * FROM gallery2 WHERE topic_id="1781870" UNION SELECT * FROM gallery2 WHERE topic_id="1626279" UNION SELECT * FROM gallery2 WHERE topic_id="217154" UNION SELECT * FROM gallery2 WHERE topic_id="620369" UNION SELECT * FROM gallery2 WHERE topic_id="242875" UNION SELECT * FROM gallery2 WHERE topic_id="1170859" UNION SELECT * FROM gallery2 WHERE topic_id="1760993" UNION SELECT * FROM gallery2 WHERE topic_id="994785" UNION SELECT * FROM gallery2 WHERE topic_id="875278" UNION SELECT * FROM gallery2 WHERE topic_id="338698" UNION SELECT * FROM gallery2 WHERE topic_id="1128266" UNION SELECT * FROM gallery2 WHERE topic_id="1171338" UNION SELECT * FROM gallery2 WHERE topic_id="1239335" UNION SELECT * FROM gallery2 WHERE topic_id="1204932" UNION SELECT * FROM gallery2 WHERE topic_id="1483433"