import math

def sito(n):
    numbers = [i for i in range(2,n,1)]
    print(numbers)
    num = numbers[0]
    i=0
    num=numbers[i]

    while(True):

        if(num>math.sqrt(n)):
            break
        numbers =[numb for numb in numbers if (numb%num != 0 or numb<=num)]

        i+=1
        if(i>len(numbers)):
            break
        num=numbers[i]
    return numbers



def NWD(a, b):
    if (b > a):
        a, b = b, a
    t=0
    while (b != 0):
        t = (a - int(a / b)*b)
        #print(t)
        a = b
        b = t
        #print(b)
        #print(a)
    return a





a =1920
b =162

#print(x,y)
print(NWD(1920,162))
#print(sito(30))