require 'open-uri'
require "pp"

sio = OpenURI.open_uri("https://www.chintai.net/rent/")

area = []
sio.each_line do |l|
	if l =~ %r|rent/[a-z]+/ensen|
		area << l.slice(%r|(rent/[a-z]+/ensen)|, 1)
	end
end

pp area