#include<bits/stdc++.h> using namespace std; int i,a,b,j,s; int su(int i){ int a=2; while(a<i){ if(i%a==0){ return 0; } a++; } return 1; } int main(){ j=1; for(i=1013;i<=3000;i+=2){ a=i/1000*1000; b=i/100%10*100; if(su(i)==1&&su(i-a)==1&&su(i-a-b)==1&&su(i%10)==1){ cout<<i<<endl; } } }