#include<iostream>
#include<cmath>

using namespace std;
bool pd(int n);

int main(){
	
	int n;
	
	cin>>n;
	
	for(int i=2;i<=n-2;i++){
		if(pd(i) && pd(i+2)){
			cout<<i<<" "<<i+2<<endl;
		}
	}
}



bool pd(int n){
	bool f;
	
	 
	f=true;
	
	for(int i=2;i<=sqrt(n);i++){
		if(n%i==0){
			f=false;
			break;
		}
	}
	
	 
	if(f==false || n==0 || n==1){
		return false;
	}
	else
	{
		return true;
	}
}


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