Jotto full code to spec

gistfile1.rb

print "Number of letters? "
input = gets.chomp.to_i

class String

  def uniquely_lettered?
    self.scan(/./).uniq.length == self.length
  end
  
end

filename = "C:/Users/Godd2/ruby/Jotto/jotto_words.txt"
words = File.open(filename, 'r') {|f| f.read.split("\n")}
words.delete_if {|word| (word.length != input) || !(word.uniquely_lettered?) }
puts words.sample