#include <iostream>
#include <bitset>
#include <cstdio>
#include <vector>
using namespace std;

int n;
bitset<200> orase[200];

int main()
{
    freopen("oras.in","r",stdin);
    freopen("oras.out","w",stdout);
    scanf("%d",&n);
    if(n%2==0)
    {
        printf("-1");
        return 0;
    }
    fclose(stdin);
    fclose(stdout);
    return 0;
}