#include<iostream>
#include<cmath>
using namespace std;

bool is1(int a)
{
	int flag = 0;
	for (int i = 2; i <= sqrt(a); i++)
	{
		if (a%i==0)
		{
			flag = 1;
			break;
		}
	}
	if (flag == 0)
	{
		return true;
	}
}

bool is2(int a)
{
	int j, m;
	j = a;
	m = 0;
	while (j>0)
	{
		m = m * 10 + j % 10;
		j /= 10;
	}
	if (m==a)
	{
		return true;
	}	
}

int main()
{
	int i;
	cin >> i;
	int a, b;
	cin >> a >> b;
	for (int i = a; i <= b; i++)
	{
		if (is2(i)  && is1(i))
		{
			cout << i << endl;
		}
	}
	return 0;
}