è?o??¨?????????é£???¥????-??o???????????o???????
???�????????????
è?o??¨???????°±??ˉ????¤????pk???é?£??a?????-????|?????????¥????????′??-???é????°?¥1?????ˉ????????????????oo????¥1???
???�????????????
è?o??¨?????????è?????è????±????£°????????ˉ??ˉè?¤?????????
???é£?????????±???
è?o??¨??????a?|a?|6???
????°±???èˉ¥??¥è?a??????è?±???
???�?????????????o???????
è?o??¨??????????1??????ˉ???
???�??????�????????????
è?o??¨??????????-¤??¥?????±?????????????????-?1???????é????????è???3????
???�??????!???
???????????o??????è?o??¨????o??????????????????????????ˉ1?????a?¥3?????-???????????a??ˉ???????????′è?£è???·2???
??????è???§????é?±???????-???¥???èo?è?1????????o????°±??ˉ???èμ????????¥3?oo????????¥???????????¢??¨????????-???è???o??¥3?ooè??????????aè£????è???¤§????????°?¥1?????????é?¢??????
a???|?????¥1???é?£?o??¥3?oo?????·????????1é?±?°±è′′?????¥???é?£?1??°±??°?-¤??o?-¢?o????a??
è?o??¨???è???§????è§????????????o??°é2???????
*
?§??2¥?2¥??¨?13??°???????o?????o???3?o???′??-?????¥èˉ??????????????o?????¤???′??-é?′??aè??????o????????ˉ1?o???′??-?μ??¨??1??????ˉè????¥è???o?解???
?¥1???????°??±3?2¥?????oè???????o????????a?2??????¤???è???????o??a?????1?????3?3¨?1????????o??2???????????oo????????3èˉ·è????¤???èμ???????
?-?????¥?è???o??1????????¥1??????????1°?o?????o???′??-??¨????°?é????·??????è£????
?¥1??¥é??è§????????1?é??è|???°é2????????|????è?a?·±?????′?????????èˉ?????2?????????????????μ?é?????
a???-???¥???èμ?é?±?o????????????′è?£??-?-|????o????è?o?ˉ?è???¥????a??
????¤??????′??-????o??§??2¥?2¥??????????¥1?????3?????′èμ°?????????