??°??¨??????????o????e?￡??a?￡°e?3??1????????ˉ?oo????????ˉ??°???????′??¨??o?e?a??|???????¤oe?3?????a??ˉ???e?￡???????¤a?′§??????????????μ????¤oe?3???????o??????????e???-￥?￡°???
?????????e?a?·±e?°???????????????e?￡??a?-??-??°±?????¨????-???|???e?1?????±??????????????????e??e????°??????????????????????ˉ1?-??-?eˉ′?????????????-?????????￥????-??-?eˉ′????￥????
????????￥????1??2??????????e?????
?2??¤?????¤′??????e?a?·±?????????e?￡??a????????????e??????¤?e????￡?????????e??????¤???a??????????1???????????????a?°??¨??o????e??e??????????￥??oe?a?·±?????????e???¤???????????12?????????e??????????a??ˉ??????????-?e????°?o?e?a?·±??????e§??????°??1????????????e￡?????-???¨???
???e???￡°eˉ′?????ˉ???????￥???????eˉ′?????????eˉ￥e??????-?e???1??1????
e??e?￠???????2????????o????
?2??¤??????¨e???-???????e??????2????e?¨?????????e??????????′??￠??￠?2??o?????????????e?°eμ·??￥?o????e?￡??a?°??-??????ˉ?oo?????ˉ????¤§?-|??????????????a?¨??o?????????¨?μ?eˉ??????ae?a???eˉ-e¨??¨???????????????????e??e?￠????o???????e?a?·±?°???????eˉ?e???????￥eˉ??????3e???¨????eˉ′eˉ???′????oo??????????¨????e·??o??????a?¤???????????????¨??￥???e???¤???o???e???2?????oo???e???????￡??????
e?￡e????￡??????eˉ?e????￥??ˉ?????￥eˉ???????e??????????ˉ?????ˉ?????a?oo???
?2??¤?????????￡????o??????????e?￡e????￡???????o????e???3¨e?????eˉ′??????e????¨e???¤§????-????e???¤§?????1????????????eˉ???????
?2??¤??????￥???e?￥e?????e???3¨e?????e?￡e???3¨e???????¨?????????????°??????¨?????ˉ??a??????e?a?·±???????????????eˉ-??????????????ˉ????|???????????¤?????????¨?o???????e|?e?°???e?a?·±??ˉe°??????????e??e???3¨e??e?????????·±???e????¨??????e????￡?????-e?′??????????2??2??-??··e???2????????????￥??oe?￡??a?-??-??°?e?????????3¨?????°????????ˉ???????¤????e§?e?￡??a?-??-???±??????????????¨??±???e?????????????????e????￥???e?￡??a?-??-?????????ˉeˉ?????o?e?￡e???3¨e??????????????e?????e????°e??e?a?·±????????ˉ?????ˉ?????a?oo???
?????￥e?1???e￠??????????eμ°?????°???e|?????′???????e????????????°±???e?￡??a?¨????e????????e????o????oo????????′??a?°?e???o??????ae°??1???????????￡???￥?????°??1????????????e?a?·±???e?°?????????????????????e??e??e?°???????????ˉ?????￥?2???????e??e?￡??a?¨?????????·???
?????￥??oe?a?·±????12????o????
???????o????????????????e?￡e???-???????????????￡??????
?2??¤???????e?????????????¨????????????e???￡°eˉ′???????????￥?o???????eˉ′????ˉ1???eμ·???e??????-??o?e???1??1????
e??e?￠?2????????o???????e?￡?1????e??e???????¨e???-?e??????°??oo?¤′e??????°??o￠e?±?o￠???????????′e?????
e????·????￡°e?3????????oe???????o??￥???e??e????????eˉ′????2??¤???????eˉ′???e?￡??a?¨??o???????????????1??????
?2??¤??2?e???o?????????????eˉ′???????????·??????eˉ′????????ˉ?·±???e??e????o??￥???????????ˉ???e????￡???e??e????o??￥??????????????o????????°??1????????·???
e????·eˉ′??????????1???3e|??????a?-?????????ˉ?????ˉ???
?2??¤??2????????-??????????????????¨e??e?￠??????eˉ′??????e|???????e?￡??μe?°??????e?????e????¨e?°????¤?e?￠??????e￥????
e??e?￠e????????????????a????????a??-?¤?????μ???°??o??¤??·???e￥?????????·??ˉ?????￠?13???e?2?????????????°???????????2???????????±3?2????e?￡??ˉ???????1′????-?e????￥???e?°????????|?????·??ˉ?????￠?¤?e?￠?????????????±?e??e????????e?2e??e?????e??e??????μ???¨???????°?????o1e·ˉ????????ˉ?????μe￠???????e???????￡??????
?2??¤?e?¤??oe?￡?±?e??e?????????￡°??±e?￠e?????????????????e???￠????????1???ˉe???§???·?-????