#include<cstdio>

#include<string>

#include<cstring>

#include<iostream>

#include<algorithm>

using namespace std;

int ans;

char s[];

int main()

{

    cin>>s;

    for(int v=;v<=;v++)

    {

        int cur=;

        for(int i=;i<strlen(s);i++)

        {

            cur=cur*+s[i]-'';

            cur%=v;

        }

        if(cur==) printf("%d ",v),ans++;

    }

    if(ans==) printf("none\n");

    return ;

}