you should add a test case like GrantII does in his 'divisible by X' problems...
thanks for advice! done! :)
Your testsuite is still incomplete. I recommend you to include cases where Ciphertext and Key both contain upper and lower case letters
Please kindly note that your test case 3 (a='az' b='za' y_correct='zz') is wrong. If you re-score all solutions, I think none of them would pass this test case. However, you may need to re-score multiple times because ind = randi(3) does not necessarily yield ind = 3.
thanks, I missed that mistake. it should be ok right now.
cheater. what's the point of doing that?
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