????μ±ìì??è???μúò?μ?óêμ?ê±oò￡??ò?÷°×á?×??o2￠2?ê?±?ò??úμ????????é?￡?ú???úμ?±??μ?ò?′μ?á?ìì???????￠?￠μ?ê?1a?￡×·?°×?àí??￡??ò?ò????é??￥?y?y?????-?-?￡

????′ó???D?aD?ê±oò?1óD???ˉè?D???μ??D??￡???ê?2????°μ?ò???ííé?￡?·￠??×??o??è?á?ò?????ì?μ?????￡????ü3?3a×?oú°μ￡??òéì?1×???±?è′?D′￥2?μ?μ?μ?D??￠?￡?ì??μ????￡?D￡?óDá????T?é??×′μ??????￡?òo?o°×?￡?è′2??aéùò?è?o?·￠3?￡???ò??ì?òì??áμ?ê2?′ê???í??￡è??ú???￡?D￡?×üê??T·¨?′???°??μ??·?￡?ò???üò?2?2??è??μ??ò?°?2?ˉ￡?2??a?°DDá??à??￡??ò?Dêüμ?á?ò???ê?1a￡??í??ê§o?μ?′?í?è???μ?á?μ??t￡???ò??ì￡??òóDá?éúμ??êí?￡??ü?àμ?ê????°·?????μ?1aμ??ìáμ?￡?ò??á|μ??òμ?1a??1yè￥￡??üá?￡?ê?2??￠??2??￠°?2??-?-

????′-?￠×?????????·￠éúμ?ò??D￡?ê????e￡??1ê?????￡??ò?üìy??D??à?ú?¤áòμ????ˉoó?ù·￠3?μ?????éù?￡?1ò??￠?1ò??1ê??1ò?￡?ê?×??o??×??oê??óì??àμ??1á|?e￡??ò2???3t￡??t?2μ?ò1??￡???éùí??￡μ?è?·í￡??ò?D??μ?′?ê±μ?×??o??óú??D?￡??éò?????￡??1?éò????ˉéíì??￡ò??D2?1yê?3???????ò??￡

????????ê???￡?è′?T·¨?ìD?è??ˉ￡?3¤ê±??μ??DòYè??ò???êμ?D?áé?ú???D?y?y?1??￡??ò2?μ?è?éúμ?×?±êoí??o?μ?μ??t?￡?úàD?óμ???êD￡?êéè?μ???Dé?y?y2?ê3×??ò??μ?éú?ü￡????μàí??ê?????￡?μ???àí??ò2Díá?????μ?D?×′ò22??áóD±??ˉ?￡

?????y?yμ??2??D?￡???D÷ò?????±?2|?a￡??ò????μ????°×????Dμ?????ê?1a￡?è′·￠???ü??ê????Dμ?????￡??ú?ˉ???D?y?yμ?·￠éúá?±??ˉ￡?óéDé?T???ìμ???±?3éá?óêμ?￡??ú??μ?μ???ò??ì￡??á?¨2?ò?μ?èú??á?ò?á￡3á?ˉμ???×ó￡?????á￡??×ó?úóê??×ìèó??￡?éì?1×?éíì?￡?×?±???íá??3??￡