#include <bits/stdc++.h>

using namespace std;


bool isSimple(int num) {
    if (num == 4) {
        // Edge case
        return false;
    }

    int stop = num / 2;
    for (int i = 2; i < stop; i++) {
        if (num % i == 0) {
            return false;
        }
    }
    return true;
}


bool sumIsSimple(int num) {
    int sum = 0;
    while (num > 0) {
        sum += num % 10;
        num = num / 10;
    }
    // cout << sum << " " << isSimple(sum) << endl;
    return isSimple(sum);
}


int main() {    
    int N;
    cin >> N;

    for (int i = 11; i <= N; i += 2) {
        if (isSimple(i) && sumIsSimple(i)) {
            cout << i << endl;
        }
    }
   return 0;
}