include
include
using namespace std; int main() {
long long L,R,m=0;
cin>>L>>R;
for(long long i=1;;i++)
{
if(i*i>R)
{
break;
}
if(i*i>=L&&i*i<=R)
{
long long k=i*i;
long long sum=0;
while(k)
{
sum+=k%10;
k=k/10;
}
for(long long j=2;j<sum;j++)
{
if(sum%j==0)
{
break;
}
if(j==sum-1)
{
cout<<i*i<<" ";
m=1;
break;
}
}
}
}
if(m==0)
{
cout<<"0";
}
return 0;
}