#!/usr/koeki/bin/ruby

srand()

def random(ary)
  i = 0
  changed = Array.new
  while i < ary.length
    lr = rand(2)
    if lr == 0
      take = ary.shift
      changed << take
    else 
      take = ary.pop
      changed << take
    end
  end
  return  changed
end

char = ["花","鳥","風","月"]

$KCODE = 'e'

prob = random(char)

print("次の熟語を正しくならべかえなさい: \t")
printf("\v%s %s %s %s\n",prob[0], prob[1], prob[2], prob[3])

answer = gets.chomp!

if answer == #{char}
    print("正解!\t次の問題です!\n")
end