#include<bits/stdc++.h>
using namespace std;
int yzh(int n)
{
    int s=0;
    for(int i=2;i<=n-1;i++)
    {
        if(n%i==0)
        {
            s+=i;
        }
    }
    return s;
}
int main()
{
    int n;
    cin>>n;
    for(int i=1;i<=n;i++)
    {
        for(int j=1;j<=n;j++)
        {
            if(yzh(i)==j&&yzh(j)==i)
            {
                cout<<i<<" "<<j<<endl;
            }
        }
    }
    return 0;
}
/**************************************************************
	Problem: 1140
	User: wuzhijing
	Language: C++
	Result: Accepted
	Time:28 ms
	Memory:2072 kb
****************************************************************/