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I successfully completed the Vigenere program and I was recently testing it with Check50. My problem is that there is only one test that fails, and I don't know why:

:( encrypts "BaRFoo" as "CaQGon" using "BaZ" as keyword 
     \ expected output, but not "CaQGoh\n"

Here is my sandbox link: https://sandbox.cs50.net/checks/58eb0850663548a7bcd378320a860169.

What's going on behind the scenes?

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That check50 test is to make sure that you handle situations where the case of the key does not match the case of the text.

  • key is lower and text is upper, or
  • key is upper and text is lower

So make sure your code deals with those situations.

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