http://myurl.com/page.pl?key1=AAA&key2=val2&key3=val3
http://myurl.com/page.pl?key1=val1&key2=AAA&key3=val3
http://myurl.com/page.pl?key1=val1key2=val2&key3=AAA

http://myurl.com/page.pl?key1=BBB&key2=val2&key3=val3
http://myurl.com/page.pl?key1=val1&key2=BBB&key3=val3
http://myurl.com/page.pl?key1=val1key2=val2&key3=BBB