a-hooks.rb

require 'set'

sevens = Set.new
eights = []

for line in open("/home/john/scrabble/twl.txt") do
    word = line.strip
    if word.size == 7 then
        sevens << word
    elsif word.size == 8 and /^A/ === word
        eights << word
    end
end

for eight in eights do
    puts eight if sevens.member?(eight[1, 8])
end