public static int getTotalX(List<int> a, List<int> b)
    {
        List<int> commonDivisors = new List<int>();
        List<int> results = new List<int>();
        
        int divisor = a.Max();
               
        bool rightDigit = new bool();
        
        while(divisor <= b.Min())
        {
            rightDigit = true;
            
            foreach(int x in a)
            {
                if(divisor%x != 0){rightDigit = false;break;}
            }
            
            if(rightDigit) commonDivisors.Add(divisor);
            
            divisor++;
        }
        
        foreach(int commonDivisor in commonDivisors)
        {
            rightDigit = true;
            
            if(commonDivisor <= b.Min())
            {
                foreach(int x in b)
                {
                        if(x%commonDivisor != 0){rightDigit = false;break;}
                }
            }
            
            if(rightDigit) results.Add(commonDivisor);
        }
        
        return results.Count;
    }