User-agent: Hatena Antenna
Disallow:

User-Agent: Googlebot
Disallow: /sec
Disallow: /cgi/
Disallow: /x
Disallow: /link

User-Agent: Googlebot-Image
Disallow: /img/bg
Disallow: /img/temp
Disallow: /link
Disallow: /x

User-agent: Megalodon
Disallow: /

User-agent: *
Disallow: /