def prime(n):  
    if n <= 1:  
        return 0  
    for i in range(2,n):  
        if n%i == 0:  
            return 0  
    return 1 



a=list(map(int,input().split()))
if a[0]>=a[1]:
    t=a[0]
    a[0]=a[1]
    a[1]=t
for i in range(a[0],a[1]+1):
        if prime(i):
            print(i)