public static int getTotalX(List<Integer> a, List<Integer> b) {
        // Write your code here
        int outputCounter = 0;
        Collections.sort(a); Collections.sort(b);
        int min = a.get(0); int max = b.get(b.size()-1);
        
        int selectedNumber = min;
        
        boolean firstArrayCheck = false;
        boolean secondArrayCheck = false;
        for (int i = min; i <= max ; i+=1) {
            
            for (int j = 0; j < a.size(); j++ ) {
                if ( selectedNumber % a.get(j)  == 0 ) {
                    // do nothing
                    firstArrayCheck = true;
                } else {
                    firstArrayCheck = false; break;
                }
            }
            
            if (firstArrayCheck) {
                for (int j = 0; j < b.size(); j++ ) {
                    if ( b.get(j) % selectedNumber == 0 ) {
                        // do nothing
                        secondArrayCheck = true;
                    } else {
                        secondArrayCheck = false; break;
                    }
                }
            }
            
            if (firstArrayCheck && secondArrayCheck) outputCounter++;
            
            // Resetting ArrayChecks
            firstArrayCheck = false; secondArrayCheck = false;
            
            selectedNumber += 1;
        }
        
        return outputCounter;

    }