Ladder

SELECT * FROM gallery2 WHERE topic_id="169839" UNION SELECT * FROM gallery2 WHERE topic_id="638209" UNION SELECT * FROM gallery2 WHERE topic_id="873225" UNION SELECT * FROM gallery2 WHERE topic_id="827482" UNION SELECT * FROM gallery2 WHERE topic_id="1146801" UNION SELECT * FROM gallery2 WHERE topic_id="46378" UNION SELECT * FROM gallery2 WHERE topic_id="134590" UNION SELECT * FROM gallery2 WHERE topic_id="695020" UNION SELECT * FROM gallery2 WHERE topic_id="850216" UNION SELECT * FROM gallery2 WHERE topic_id="1789086" UNION SELECT * FROM gallery2 WHERE topic_id="1312823" UNION SELECT * FROM gallery2 WHERE topic_id="248746" UNION SELECT * FROM gallery2 WHERE topic_id="172861" UNION SELECT * FROM gallery2 WHERE topic_id="2756" UNION SELECT * FROM gallery2 WHERE topic_id="1033138" UNION SELECT * FROM gallery2 WHERE topic_id="672398"