User-agent: Yandex
Disallow: /*_openstat
Disallow: /*from=adwords
Disallow: /*utm_source
Disallow: /_system/
Host: www.br21.ru

User-agent: Googlebot
Disallow: /*_openstat
Disallow: /*from=adwords
Disallow: /*utm_source
Disallow: /_system/

User-agent: *
Disallow: /_system/