#include <iostream>
using namespace std;
bool ss(int n){
	bool f=true;
	if(n<=1)f=false;
	else if(n==2)f=true;
	else{
		for(int i=2;i*i<=n;i++){
			if(n%i==0){
				f=false;
				break;
			}
		}
	}
	return f;
}
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: xuanhua
	Language: C++
	Result: Accepted
	Time:4 ms
	Memory:2072 kb
****************************************************************/