class Encryption:
    ENCRYTPION_KEY = "MASTER_KEY"

    @staticmethod
    def vigenere(text: str, key: str, encrypt=True):
        result = ''

        for i in range(len(text)):
            letter_n = ord(text[i])
            key_n = ord(key[i % len(key)])

            if encrypt:
                value = (letter_n + key_n) % 1114112
            else:
                value = (letter_n - key_n) % 1114112

            result += chr(value)

        return result

    @staticmethod
    def encrypt(text: str):
        return Encryption.vigenere(text=text, key=Encryption.ENCRYTPION_KEY, encrypt=True)

    @staticmethod
    def decrypt(text: str):
        return Encryption.vigenere(text=text, key=Encryption.ENCRYTPION_KEY, encrypt=False)