#include <bits/stdc++.h>
using namespace std;
bool ss(int i){
	if(i==1||i==0)return 0;
	for(int o=2;o<i;o++)if(i%o==0)return 0;
	return 1;
}
int main(){
	int i;
	cin>>i;
	for(int o=0;o<=i-2;o++)if(ss(o)&&ss(o+2))cout<<o<<" "<<o+2<<"\n";
	return 0;
}

/**************************************************************
	Problem: 1139
	User: zhouhongyi
	Language: C++
	Result: Accepted
	Time:12 ms
	Memory:2072 kb
****************************************************************/