/* -*- coding: utf-8 -*-
 *
 * 1006.cc:  No.1006 Share an Integer - yukicoder
 */

#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<cmath>
#include<iostream>
#include<string>
#include<vector>
#include<map>
#include<set>
#include<stack>
#include<list>
#include<queue>
#include<deque>
#include<algorithm>
#include<numeric>
#include<utility>
#include<complex>
#include<functional>
 
using namespace std;

/* constant */

const int MAX_X = 2000000;

/* typedef */

/* global variables */

int fs[MAX_X];
int as[MAX_X];

/* subroutines */

/* main */

int main() {
  int x;
  scanf("%d", &x);

  for (int i = 1; i < x; i++) fs[i] = i;

  for (int p = 1; p < x; p++)
    for (int i = p; i < x; i += p) fs[i]--;

  int mind = x, m = 0;
  for (int a = 1; a * 2 <= x; a++) {
    int b = x - a;
    int d = abs(fs[b] - fs[a]);
    //printf("a=%d, b=%d -> d=%d\n", a, b, d);

    if (mind > d) {
      mind = d;
      m = 0;
      as[m++] = a;
      if (b != a) as[m++] = b;
    }
    else if (mind == d) {
      as[m++] = a;
      if (b != a) as[m++] = b;
    }
  }
  sort(as, as + m);

  for (int i = 0; i < m; i++) printf("%d %d\n", as[i], x - as[i]);
  return 0;
}