import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Scanner;

public class Main {
	public static void main(String[] args) throws Exception {
		Scanner sc = new Scanner(System.in);
		int x = sc.nextInt();
		sc.close();

		int x2 = x / 2;
		Eratosthenes er = new Eratosthenes(x);
		int min = Integer.MAX_VALUE;
		List<Integer> list = new ArrayList<>();
		for (int i = 1; i <= x2; i++) {
			int f1 = f(er, i);
			int f2 = f(er, x - i);
			int v = Math.abs(f1 - f2);
			if (v < min) {
				min = v;
				list.clear();
				list.add(i);
			} else if (v == min) {
				list.add(i);
			}
		}

		PrintWriter pw = new PrintWriter(System.out);
		for (int i = 0; i < list.size(); i++) {
			pw.println(list.get(i) + " " + (x - list.get(i)));
		}
		for (int i = list.size() - 1; i >= 0; i--) {
			pw.println(x - list.get(i) + " " + list.get(i));
		}
		pw.flush();
	}

	static int f(Eratosthenes er, int n) {
		if (n == 1) {
			return 0;
		}
		Map<Integer, Integer> soinsu = er.bunkai(n);
		int d = 1;
		for (int i : soinsu.values()) {
			d *= i + 1;
		}
		return n - d;
	}

	static class Eratosthenes {
		int[] div;

		public Eratosthenes(int n) {
			div = new int[n + 1];
			div[0] = -1;
			div[1] = -1;
			int end = (int) Math.sqrt(n) + 1;
			for (int i = 2; i <= end; i++) {
				if (div[i] == 0) {
					div[i] = i;
					for (int j = i * i; j <= n; j+=i) {
						if (div[j] == 0) div[j] = i;
					}
				}
			}
			for (int i = end + 1; i <= n; i++) {
				if (div[i] == 0) div[i] = i;
			}
		}

		public Map<Integer, Integer> bunkai(int x) {
			Map<Integer, Integer> soinsu = new HashMap<>();
			while (x > 1) {
				Integer d = div[x];
				if (soinsu.containsKey(d)) {
					soinsu.put(d, soinsu.get(d) + 1);
				} else {
					soinsu.put(d, 1);
				}
				x /= d;
			}
			return soinsu;
		}

		public boolean isSosuu(int x) {
			return div[x] == x;
		}
	}
}