User-agent: Yandex
Disallow: /1/letter 
Disallow: /2/letter
Disallow: /3/letter
Disallow: /4/letter
Disallow: /calendar
Disallow: /search*
Host: forum.nbprice.ru

User-agent: *
Disallow: /1/letter
Disallow: /2/letter
Disallow: /3/letter
Disallow: /4/letter
Disallow: /calendar
Disallow: /search*