Question: Alice sends Bob a ciphertext encrypted using a Csar cipher. Bob knows the shift amount, but being a beginner in cryptography at this stage, he

Alice sends Bob a ciphertext encrypted using a Csar cipher. Bob knows the

shift amount, but being a beginner in cryptography at this stage, he accidentallyencrypts it rather than decrypting it. Fortunately, by doing so, he still recovers the original plaintext. What was the shift amount?

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