User-agent: Yandex
Disallow: /lib/
Disallow: /a1/
Disallow: /a2/
Disallow: /selection/
Host: www.nibelunge.ru

User-agent: Googlebot
Disallow: /lib/
Disallow: /a1/
Disallow: /a2/
Disallow: /selection/

User-agent: *
Disallow: /lib/
Disallow: /a1/
Disallow: /a2/
Disallow: /selection/