https://peace.5ch.net/test/read.cgi/tech/1313183984/661, http://toro.2ch.net/test/read.cgi/tech/1354393458/335
http://ideone.com/jLJydK
https://peace.5ch.net/test/read.cgi/tech/1313183984/664, http://toro.2ch.net/test/read.cgi/tech/1354393458/335
http://ideone.com/E6LEsO
