User-agent: *
Disallow: /img/
Disallow: /report/
Disallow: /thumbnails/
Disallow: /previo/
Disallow: /img2/

User-agente: Googlebot
Allow: /
Disallow: /img/
Disallow: /report/
Disallow: /thumbnails/
Disallow: /previo/
Disallow: /img2/