#include<bits/stdc++.h>
using namespace std;
int yzh(int a)
{
	int y=0;
	for(int i=2;i<a;i++)
	{
		if(a%i==0)
		{
			y+=i;
		}
	}
	return y;
}
int main()
{
	int n;
	cin>>n;
	for(int i=2;i<=n;i++)
	{
		for(int j=2;j<=n;j++)
		{
			if(yzh(i)==j && yzh(j)==i)
			{
				cout<<i<<" "<<j<<endl;
			}
		}
	}
	return 0;
}
/**************************************************************
	Problem: 1140
	User: chenkexin
	Language: C++
	Result: Accepted
	Time:32 ms
	Memory:2072 kb
****************************************************************/