#!/usr/koeki/bin/ruby

$KCODE = 'e'
vocab = Hash.new

STDERR.printf("何か教えてよ\n")
sentence = gets.chomp

while true

  if /^(\S+)(は)(\S+)(ね|の|だ|で)/ =~ sentence
#    p sentence
    topic = $1  
    keyword = $3
  end
vocab[keyword] = topic
# vocab[topic] = keyword
#  p vocab

  vocab.each{
    |check|
    if (vocab.value?(topic) == true && check[0] != keyword)
      printf("%sっていうのは%sだね\n",check[0],keyword)
      print("他にも教えてよ\n")
      break
    else
      printf("%sってなあに？\n",check[1])
      break
    end
  }

  sentence = gets.chomp

end