Test Data error in 277 The Adventure of Morse Code

Wow, thanks a lot! By the way in case of such issues it would be good to click "Summon Admin" if there is no reaction in reasonable time :)

I checked what's happening and with much surprise found that python3 support had disappeared from hosting. This problem is one of the few (or the only one) using checker in python3. Let me try to contact their tech specialists and ask if they kindly can return this.

If no, I'll try to modify the checker to Python2 (which is still alive on this hosting despite being deprecated for couple years) or find a way to run checker via sandbox probably.

Well, despite answering in chat they seemingly failed to respond (or I don't know where they have created a ticket they promised), but I have just found where they have some python3 interpreter hidden (supposedly after server migration or something like this). Tried to use this in our "checker" executing functionality and seems like problem now works. Please tell if not. Thanks once more for reporting this!

Thanks for fixing this, Rodion.

I took a liberty of putting together another problem in a similar vein; the checker and the description should be in your mailbox.

Vladimir, thanks, sounds wonderful :) and thanks for notifying - I dived into mailbox and found the letter - shall put my hands on it in a few hours (just am crawling home by train).

I took a liberty of adding my own solution to the latest problem. Also submitted another problem, in a rather different key.

One thing that is unclear to me - is the following a constraint that a solution must satisfy: "Moriarty is using sequences of between ten and thirteen words"?

That's a property of every encoded string. Solutions are welcome to include a check for this, or not (and risk returning a wrong answer :) ).