#lang racket (provide blacklist) (define blacklist '( ; social_media "www.facebook.com" "facebook.com" "instagram.com" "twitter.com" ; "stackexchange" "askubuntu.com" "blogoverflow.com" "mathoverflow.net" "serverfault.com" "stackapps.com" "stackexchange.com" "stackoverflow.com" "superuser.com" "tex-talk.net" "thesffblog.com" ))