( )

A                                                   

D A E

ce a co, xoy pcoa

e ea o oo pa

a ae a eceoc eoo ca

D A

apaa co coa:

G(app) E

\"p cace pacoa\".

oca oy a eo ce,

oy a eo, xo, oe pacoe,

Oo oo ya apo eoo ca,

coa apaa co coa:

\"p cace pacoa\".

, e c, , opoo,

pay a coe coo.

oya c, co e ce.

, e c, co e.

e, paae, oo co pa

a eo ce ep o pcoa,

ao o ec, y o coec ca.

A coa o ece:

\"p cace pacoa\"