#include<iostream>
#include<vector>
#include<string>
using namespace std;
bool prime(long long n) {
	for (long long i = 2; i <= sqrt(n); i++)
		if (n % i == 0)
			return false;
	return true;
}
int main(){
	int n;
	cin >> n;
	vector<int>arr(n);
	arr[0] = 2;
	arr[1] = 2;
	arr[2] = 4;
	arr[3] = 6;
	arr[4] = 9;
	for (int i = 5; i < n; i++) {
		for (int j = 1; j < 9; j++) {
			if (prime(arr[i - 4] * 10000 + arr[i - 3] * 1000 + arr[i - 2] * 100 + arr[i - 1] * 10 + j)) {
				arr[i] = j;
				break;
			}
		}
	}
	for (int i = 0; i < n; i++)
		cout << arr[i];
}