gistfile1.rb

letters = 'satire'

dictionary = {}
results = []

File.open("/usr/share/dict/words", "r") do |infile|
  while line = infile.gets
    word = line.chomp.downcase
    next if word.size != 7
    key = word.chars.sort.join
    if dictionary.has_key? key
      dictionary[key] << word
    else
      dictionary[key] = [word]
    end
  end
end

('a'..'z').each do |letter|
  key = (letters + letter).downcase.chars.sort.join
  results += dictionary[key] if dictionary[key]
end

results.sort.each { |word| puts word }