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The secret is mjqqt. The letter q appears twice, so the rule guesses that q stands for e…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
The secret is mjqqt. The letter q appears twice, so the rule guesses that q stands for e. What does the guess give? What is the real message, and how can the program find it?
Need a reminder? The key ideaShow
A short text can fool a rule that needs a long text.
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, compare your working with the solution.
The guess. q is place , e is place , so the guessed shift is . Moving back by gives axeeh, which is not a word.
The real message. The text is too short. A pair of equal letters is the commonest by chance, and here it stands for l, not e. Try every shift: the shift of gives hello.
The program can try all shifts and keep the one that gives common English words. The lab does exactly that.
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