#include <stdio.h>
int main()
{
	int a, b, t, f=0, i, j;
	scanf("%d %d",&a,&b);
	if(a > b)
	{
		t = a;
		a = b;
		b = t;
	}
	if(a == 0)
		++a;
	for(i = a;i <= b;++i)
	{
		f = 0;
		for(j = 2;j <= i/2;++j)
		{
			if(i % j ==0)
			{
				f = 1;
				break;
			}
		}
		if(f == 0)
			printf("%d ",i);
	}
	return 0;
}