func getTotalX(a: [Int], b: [Int]) -> Int {

    var allElementsAreMultiple = false
    var numberIsMultipleOfAll  = false

    let minB = b.reduce(b[0], min)

    var total = 0

    for i in 1...minB {
    
        allElementsAreMultiple = a.map { return i % $0 == 0 }.reduce(true, {$0 && $1})
        numberIsMultipleOfAll  = b.map { return $0 % i == 0 }.reduce(true, {$0 && $1})
        
        if (allElementsAreMultiple && numberIsMultipleOfAll)
        {
            total += 1
        }
    }

    return total
}