#!/usr/bin/env ruby
def main
  w=[]
  File.open('/usr/share/dict/words'){|f|f.each{|l|w<<l.chomp.downcase}}
  puts "How many letters is it?"
  l=gets.to_i
  w=w.find_all{|x|x.length==l}
  puts "Hmm.  That matches #{w.length} words."
  [[:first,0],[:last,-1]].each{|x|
    puts "What is the #{x[0]} letter?"
    l=gets.downcase[0]
    w=w.find_all{|y|y[x[1]]==l}
    puts "That narrows it down to #{w.length} words"
  }
  [10,w.length].min.times{|i|
    puts "Is it #{w[i]}?"
    return "HA! I told you I was smart!" if gets =~ /^y/i
  }
  return "You beat me!"
end
puts main