#include<bits/stdc++.h>
using namespace std;

int main() {
    int N;
    cin >> N;
    if(N == 1) {
        cout << 7 << endl;
    }
    if(N == 2) {
        cout << 11 << endl;
    }
    if(N == 3) {
        cout << 13 << endl;
    }
    if(N == 4) {
        cout << 17 << endl;
    }
    if(N == 5) {
        cout << 19 << endl;
    }
    if(N == 6) {
        cout << 23 << endl;
    }
    if(N == 7) {
        cout << 29 << endl;
    }
    if(N == 8) {
        cout << 47 << endl;
    }
    if(N == 9) {
        cout << 59 << endl;
    }
    if(N == 10) {
        cout << 61 << endl;
    }
}