#include<bits/stdc++.h>
using namespace std;
int yzh(int n){
	int r=0;
	for(int i=2;i<=sqrt(n);i++){
		if(n%i==0){
			if(i==n/i) r=r+i;
			else r=r+i+n/i;
		}
	}
	return r;
}
int main(){
    int n;
    cin>>n;
    for(int i=2;i<=n;i++){
    	for(int j=2;j<=n;j++){
    		if(yzh(i)==j&&j!=i&&yzh(j)==i) cout<<i<<" "<<j<<endl;
		}
	}
	return 0;
}









/**************************************************************
	Problem: 1140
	User: zhuanghaoxiang
	Language: C++
	Result: Accepted
	Time:13 ms
	Memory:2072 kb
****************************************************************/