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The plaintext VACCINE is encrypted with one of the following five ciphers: Caesar, Vigenere, ADFGVX, Playfair, or monoalphabetic substitution. The resulting ciphertext is NHQVAUS. Determine

The plaintext VACCINE is encrypted with one of the following five ciphers: Caesar, Vigenere, ADFGVX, Playfair, or monoalphabetic substitution. The resulting ciphertext is NHQVAUS. Determine which of the five ciphers was used and explain why the other four ciphers cannot be the encrypting method in this case

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