# !/usr/bin/ruby -w
# -*- encoding:utf-8 -*-
# filename: main.rb
# author: 简单教程(www.twle.cn)
# Copyright © 2015-2065 www.twle.cn. All rights reserved.

if ((1..10) === 5)
  puts "5 在 (1..10)"
end
 
if (('a'..'j') === 'c')
  puts "c 在 ('a'..'j')"
end
 
if (('a'..'j') === 'z')
  puts "z 在 ('a'..'j')"
end