void main()
{
	int n,m,i,j,s,u=0,r1,r2,k;
	scanf("%d%d",&n,&m);
	for(i=n;i<=m;i++)
		if(i%2==1)
		{
			for(j=3;j<=sqrt(i);j+=2)
				if(i%j==0)
					break;
			if(j>sqrt(i))
			{
				r1=i;
				r2=0;
				for(;;)
				{
					if(r1>0)
					{r2=r2*10+r1%10;
					r1=r1/10;}
					else
					{
						if(i==r2)
						{
						if(u==0)
							printf("%d",i);
						else
							printf(",%d",i);
						++u;
						}
						break;
					}
				}
			}
		}
	if(u==0)
		printf("no");
	printf("\n");
}

