public static void printVampireNumbers() {
        for(int k : CASES) {
            for(int i = k; i < RESTRICT; i += 9) {
                for(int j = i; j < RESTRICT; j += 9) {
                    if(i * j < RESTRICT * RESTRICT) {
                        checkVampire(i, j);
                    }
                }
            }
        }
    }