hira = "あいうえおぁぃぅぇぉ\
かきくけこがぎぐげごさしすせそ\
ざじずぜぞたちつてとっだぢづでどっ\
なにぬねのはひふへほまみむめも\
やゆよゃゅょらりるれろわをんー".split(//)
while true do
 h = (0..7).collect { |i|
  hira[rand(hira.length)]
 }.join('')
 puts h
end