#include<bits/stdc++.h>
using  namespace std;
int s(int n)
{
    int i,c=0;
    for(i=2;i<=sqrt(n);i++)
    {
        if(n%i==0)
        {
        c=1;
        break;
        }
         
    }
    return c;
}
int main()
{
    int n,i;
    cin>>n;
    for(i=2;i<=n-2;i++)
    {
        if(s(i)==0&&s(i+2)==0)
        {
            cout<<i<<" "<<i+2<<endl;
        }
    }
    return 0;
}
/**************************************************************
	Problem: 1139
	User: hongjiaming
	Language: C++
	Result: Accepted
	Time:12 ms
	Memory:2072 kb
****************************************************************/