spelling game in 18 lines of ruby

speller.rb

dictionary = File.read('/usr/share/dict/words').split("\n")

dictionary = dictionary.select { |word|
  word.length > 3 && word.length < 7
}

word_picked = dictionary[rand(dictionary.size)]

system %(say "#{word_picked}")

print "Please spell the word: "
guess = gets.chomp

if guess.downcase == word_picked.downcase
  puts "You spelled it right!"
else
  puts "Nope, I was looking for #{word_picked}"
end