#include<bits/stdc++.h>
using  namespace std;
bool ss(int n)
{
	bool r=true;
	if(n<2)
	r=false;
	else
	{
		for(int i=2;i<=sqrt(n);i++)
		{
			if(n%i==0)
			{
				r=false;
				break;
			}
		}
	}
	return r;
 } 
int main()
{
	for(int i=1000;i<3000;i++)
	{
		if(ss(i)&&ss(i%1000)&&ss(i%100)&&ss(i%10))
		{
			cout<<i<<endl;
		}
	}
	return 0;
}
/**************************************************************
	Problem: 1137
	User: chenzhuo1
	Language: C++
	Result: Accepted
	Time:5 ms
	Memory:2072 kb
****************************************************************/