// NOTE: it is recommended to use this even if you don't understand the following code.

#include <fstream>
#include <iostream>
#include <vector>

using namespace std;

int main() {
    // uncomment the following lines if you want to read/write from files
    // ifstream cin("input.txt");
    // ofstream cout("output.txt");

    int N;
    cin >> N;

    // insert your code here

    if(N == 1) cout << -1;
    else{
        if(N % 2 == 0){
            for(int i = 1; i <= N/2; i++) cout << 15;
        }
        else if(N % 3 == 0){
            for(int i = 1; i <= N; i++) cout << 1;
        }
        else if(N % 3 == 1){
            cout << 55;
            for(int i = 1; i <= N - 2; i++) cout << 1;
        }
        else if(N % 3 == 2){
            cout << 5;
            for(int i = 1; i <= N - 1; i++) cout << 1;
        }
    }


    return 0;
}