#!/usr/bin/ruby -w
print "Content-type: text/html\n\n"
puts "<html><body style=font-size:1.5em;color:#0000cc;>"
primes = [11,5,7,2,13,3]
puts primes
puts "<br>"
puts primes.sort
puts "<br><br>"
parks = ["Yosemite", "Grand Canyon", "Zion", "Mesa Verde", "Petrified Forest"]
puts parks.sort
puts "<br>"
puts parks.reverse
puts "<br>"
puts parks.length
puts "<br>"
parks = parks + ["Rocky Mountain"]
puts parks.length
puts parks
puts "<br>"
parks = parks - ["Grand Canyon", "Mesa Verde", "Petrified Forest", "Rocky Mountain"]
puts parks.length
puts parks.to_s
puts "</body></html>"
