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http://twitter.com/itkz/statuses/268075532
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http://labs.cybozu.co.jp/blog/takesako/2007/09/core_dump_core_golf.html
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http://d.hatena.ne.jp/odz/20070911/1189528222
http://blog.livedoor.jp/dankogai/archives/50910559.html
http://www.rubyist.net/%7Ematz/20070829.html#p06
http://blogger.ukai.org/2007/09/blog-post_11.html
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