>> ("the examples have >> AAAAA and BBBBB so I suppose the next 'ver' will be CCCCC" and then the >> client breaks when that's not the case).
That's pretty much impossible, as no server would in reality use such scheme (I can understand when someone makes a crappy client, but a server developer strictly following example? who would use his work?). So every such stupid client programmer would figure the catch on the first try. (sorry about two separate messages)