#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;
	}

}



/**************************************************************
	Problem: 1137
	User: lidongcheng
	Language: C++
	Result: Accepted
	Time:5 ms
	Memory:2072 kb
****************************************************************/