???,6??????18???????8????????????????56??????????,?,????10????????????????20?????,???????????????,12??28??,??????2??

????????????????,??????????????,????????,???,??????????????????????

(??????? ? ??) ?????????:????? “???????”_????

?? ?????????????? ?2?????

????:1????????:?????

2?????

3??????????

4?????????????

5??????

???,6??????18???????8????????????????56??????????,?,????10????????????????20?????,???????????????,12??28??,??????2??

????????????????,??????????????,????????,???,??????????????????????

(??????? ? ??) ?????????:?????