#include<bits/stdc++.h>
using namespace std;
int ss(int n){
	if(n<2){
		return 0;
	}
	for(int i=2;i<n-1;i++){
		if(n%i==0){
			return 0;
		}
	}
	return 1;
}
int main()
{
	int i,n,s,j,d;
	for(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: zzz
	Language: C++
	Result: Accepted
	Time:6 ms
	Memory:2072 kb
****************************************************************/