User-Agent: Googlebot
Disallow:

User-agent: Mediapartners-Google
Disallow: 

User-agent: *
User-Agent: bingbot
User-Agent: msnbot
User-Agent: Slurp
User-Agent: DuckDuckBot
Disallow: /post_part*
Disallow: /author*
Crawl-delay: 20

User-agent: *
Disallow: /