User-agent: *
Disallow: /a/
Disallow: /c/
Disallow: /e/
Disallow: /h/
Disallow: /i/
Disallow: /l/
Disallow: /p/
Disallow: /r/
Disallow: /s/
Disallow: /t/
Disallow: /x/
Disallow: /z/