Jumbled Letters

Jumbled Letters

The mission is in Reviewing Mode. You can't see the solutions Leader Board, but you can see other user solutions through the Random Review after you solve the mission.

You may have seen the following meme text on Internet (click the text if you want to read its "normal" version):

Aoccdrnig to a rsceearh at Cmabrigde Uinervtisy, it deosn't mttaer in waht oredr the ltteers in a wrod are, the olny iprmoetnt tihng is taht the frist and lsat ltteer be at the rghit pclae. The rset can be a toatl mses and you can sitll raed it wouthit porbelm. Tihs is bcuseae the huamn mnid deos not raed ervey lteter by istlef, but the wrod as a wlohe.

According to a research at Cambridge University, it doesn't matter in what order the letters in a word are, the only important thing is that the first and last letter be at the right place. The rest can be a total mess and you can still read it without problem. This is because the human mind does not read every letter by itself but the word as a whole.

Well, there are elements of truth in this. Here is a very interesting article from the real Cambridge University researcher, who is breaking down the meme and explain the phenomena.

Let's try to evaluate a level of jumbling. In this mission you are given two words - normal and jumbled version. If the jumbled one is not a version of a normal or rule is not followed, you function must return -1. For the totally same looking words return 0, of course. Otherwise, exclude first and last characters (they are not jumbled according to the rule) and return an average distance (rounded to 2 digits) between normal position of a character and its jumbled position.

If there are two or more same letters in a word, consider that the first appearance of a character in a normal version is equivalent to the first appearance of that character in a jumbled version etc.

Look at the example.


Input: Two strings (str).

Output: Float number (float).


assert jumbled("vehicle", "vheclie") == 1.2
assert jumbled("checkpoint", "cehkipont") == -1
assert jumbled("doctor", "doctor") == 0
assert jumbled("research", "rsceearh") == 1.67
Invalid hot key. Each hot key should be unique and valid
Hot keys:
CheckiO Extensions

CheckiO Extensions allow you to use local files to solve missions. More info in a blog post.

In order to install CheckiO client you'll need installed Python (version at least 3.8)

Install CheckiO Client first:

pip3 install checkio_client

Configure your tool

checkio --domain=py config --key=

Sync solutions into your local folder

checkio sync

(in beta testing) Launch local server so your browser can use it and sync solution between local file end extension on the fly. (doesn't work for safari)

checkio serv -d

Alternatevly, you can install Chrome extension or FF addon

checkio install-plugin
checkio install-plugin --ff
checkio install-plugin --chromium

Read more here about other functionality that the checkio client provides. Feel free to submit an issue in case of any difficulties.

Pair Programming (Beta-version)

Welcome to Pair Programming! Engage in real-time collaboration on coding projects by starting a session and sharing the provided unique URL with friends or colleagues. This feature is perfect for joint project development, debugging, or learning new skills together. Simply click 'Start Session' to begin your collaborative coding journey!

Waiting for Pair Programming to start...

You are trying to join a pair programming session that has not started yet.

Please wait for the session creator to join.

Waiting for Pair Programming to reconnect...

It looks like the creator of the pair programming session closed the editor window.

It might happen accidentally, so that you can wait for reconnection.

<< <
> >>
exec show

Whats Next?

Free accounts will see Best CheckiO solutions with some delay.
Best Solutions will be opened in a moment
Become Awesome and Don't wait
The next stage is ""
Will be activated in
View More Solutions Random Review Solutions Go to the next mission