#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: wangyuxin
	Language: C++
	Result: Accepted
	Time:33 ms
	Memory:2072 kb
****************************************************************/