_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ , _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ .
r_ _ _ _ _ _ h is t_ e s_ _ _ _ h f_ r a_ d r_ _ _ _ _ _ _ l of e_ _ _ _ _ _ _ , d_ _ _ _ _ _ _ y or c_ _ _ _ _ _ n of n_ w i_ _ _ _ _ _ _ _ _ n or k_ _ _ _ _ _ _ e f_ r a s_ _ _ _ _ _ c p_ _ _ _ _ _ .
re_ _ _ _ _ h is the se_ _ _ h for and re_ _ _ _ _ _ l of ex_ _ _ _ _ _ , di_ _ _ _ _ _ y or cr_ _ _ _ _ n of new in_ _ _ _ _ _ _ _ n or kn_ _ _ _ _ _ e for a sp_ _ _ _ _ c pu_ _ _ _ _ .