Permutate a list of keywords and find free domains

clear_domains

lom-atelier
lom
malort
maltherapie
mal-therapie
kunsttherapie
kunst-therapie
begleitetes-malen
malatelier
mal-atelier
kunsttherapie-atelier
maltherapie-atelier

find_free_domains.rb

# encoding: utf-8
domains = File.open("clear_domains.txt")

for domain in domains.readlines()
  domain = domain.strip
  puts "#{domain}.info" if `whois #{domain}.info`.index("NOT FOUND")
  puts "#{domain}.ch" if `whois #{domain}.ch`    .index("We do not have")
  puts "#{domain}.com" if `whois #{domain}.com`  .index("No match for")
  puts "#{domain}.net" if `whois #{domain}.net`  .index("No match for")
end