he studied it for a while ; then he hit the keys that would bring the suns onto the screen , and peered broodingly at them for perhaps an hour , summoning them in all their varying configurations , now onos in the sky with tano and sitha , onos with trey and patru , onos and dovim with trey and patru , dovim with trey and patru , dovim with tano and sitha , patru and trey alone- the normal patterns , yes .