User-agent: *
Disallow: /

User-agent: Googlebot
User-agent: YandexBot
User-agent: Twitterbot
User-agent: Facebot
User-agent: Bingbot
Disallow: /wp-admin/
Allow: /wp-admin/admin-ajax.php
Crawl-delay: 4

User-agent: *
Disallow: /plus_pdf/