int main()
{
	int m,n,i,j,k=0,t=0,p=0,q,a,b,c=0,d=0;
	int x[100];
	scanf("%d %d",&m,&n);
	for(i=m;i<=n;i++)
	{for(j=1;j<=i;j++) {if(i%j==0) t++;}
    if(t==2) 
	{b=i;
	for(a=log10(b);a>=0;a--) {x[k]=b/(pow(10,a));b=b-x[k]*pow(10,a);k++;}
	q=log10(i);
	for(j=0;j<=q;j++)
	{if(x[j]!=x[q-j]) {p=1;}}
    if(p==0&&d==1){printf(",%d",i);}
	if(p==0&&d==0){printf("%d",i);c=1;d=1;}
	}
	t=0;p=0;k=0;}
	if(c==0) {printf("no");}
}