class VernamSolver:
    dictionary = None

    def __init__(self, dictionary:str):
        self.dictionary = dictionary

    def __vernamAlgorithm(self, text:str, key:str) -> str:
        result = ""

        for i in range(len(text)):
            result += self.dictionary[self.dictionary.find(key[i % len(key)]) ^ self.dictionary.find(text[i])]

        return result

    def encode(self, text:str, key:str) -> str:
        return self.__vernamAlgorithm(text, key)

    def decode(self, cypher:str, key:str) -> str:
        return self.__vernamAlgorithm(cypher, key)