ABCDEFGHIJKLMNOP
But depending on the URL you follow to get there you can get a page containing only some of the elements.
index.html?ACD
or
index.html?AP
or
index.html?GI
All different combinations return a page that could be weighted differently by an algormith and represent valid informational return data. To a person looking for the information set DE in one place, this is a valid web page. More so you can abstract the URL query variable away to www.webpage.com/DE. You can quickly run into a combinatorial explosion where even attempting to figure out if a small portion of returns is different would consume most of the energy in the visible universe.