do {
    if (data[bigram_index] !== undefined) {
        my_word = my_word.charAt(0).toUpperCase() + my_word.slice(1);
        var gram1 = data[bigram_index].gram1.charAt(0).toUpperCase() + data[bigram_index].gram1.slice(1);
        var gram2 = data[bigram_index].gram2;
        final_tweet = "Knock knock!\nWho's there?\n" + my_word + "!\n" + my_word + " who?\n" + gram1 + " " + gram2 + "!";

        if (!wordfilter.blacklisted(final_tweet)) post_tweet();
        else final_tweet = "";
        break;
    }
} while (bigram_index --> 0);