#include<bits/stdc++.h>
using namespace std;
bool sushu(int n){
    bool r=true;
    for(int i=2;i<=sqrt(n);i++){
        if (n%i==0){
            r=false;
        }
    }
    if(n<=1){
        r=false;
    }
    return r;
}
int main(){
    int q;
    cin>>q;
    for(int i=2;i<=q-2;i++){
        if(sushu(i)==true&&sushu(i+2)==true){
            cout<<i<<" "<<i+2<<endl;
        }
    }
}
/**************************************************************
	Problem: 1139
	User: luyanchen
	Language: C++
	Result: Accepted
	Time:17 ms
	Memory:2072 kb
****************************************************************/