Problems

88. Caesar cipher

Write a program that can encrypt and decrypt messages using a Caesar cipher with a right rotation and any shift value. For simplicity, the program should consider only uppercase text messages and only encode letters, ignoring digits, symbols, and other types of characters.

89. Vigenère cipher

Write a program that can encrypt and decrypt messages using the Vigenère cipher. For simplicity, the input plain-text messages for encryption should consist of only uppercase letters.

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