include <bits/stdc++.h>

define R register

define us unsigned

define ll long long

using namespace std;

bool solve(ll n) { //判断是否为质数

if (n <= 1)
	return false;
for (int i = 2; i * i <= n; i++) {
	if (n % i == 0)
		return false;
}
return true;

}

int main() {

ll l, r;
cin >> l >> r;
ll b = sqrtl(l), e = sqrtl(r);
bool flag = false;
for (ll i = b; i <= e; i++) {
	if (i * i < l)
		continue;
	if (i * i > r)
		break;
	ll t = i * i, sum = 0;
	while (t) { 
		sum += t % 10;
		t /= 10;
	}
	if (solve(sum)) {
		cout << i *i << " "; 
		flag = true;
	}
}
if (!flag)
	cout << 0; 

return 0;

}