#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(){
     //cout<<ss(121);
        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: chenlingxuan
	Language: C++
	Result: Accepted
	Time:5 ms
	Memory:2072 kb
****************************************************************/