User-agent: * 
Disallow: /printable/
Disallow: /plaintext/
Disallow: /mobile/
Disallow: / plaintext/
 
User-agent: Googlebot Disallow: /printable
User-agent: Googlebot Disallow: /plaintext
User-agent: Googlebot Disallow: /mobile
User-agent: Googlebot Disallow: / plaintext