public SubstitutionCipher getSolution(QuadGramLikelihoods likelihoods) {
        SubstitutionCipher randCipher = new SubstitutionCipher(this.ciphertext);
        double probability = randCipher.getScore(likelihoods);
        for(int i = 0; i < 10000; i++){
            SubstitutionCipher newRandCipher = randCipher.randomSwap();
            if(probability <= newRandCipher.getScore(likelihoods)){
                randCipher = newRandCipher;
                probability = newRandCipher.getScore(likelihoods);
            }

        }

        return randCipher;
    }