#!/usr/local/bin/ruby
x = (0..52).collect
i=0
srand()				# 乱数の種を初期化
while i<x.length
  t=rand(x.length)		# 交換相手を探す
  tmp=x[i]
  x[i] = x[t]
  x[t] = tmp
  i += 1
end
p x				# xを配列のまま出力