Task5Lab5_1

import java.util.Scanner;

class Task5_5_1 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int check_value = sc.nextInt();
        int i;
        if((check_value % 2) != 0) {
            System.out.println("Invalid input");
        }
        else{
            for (i = 3; i <= (check_value / 2); i += 2) {
                if (isPrime(i) && isPrime(check_value-i)) {
                    System.out.println(i + " "+(check_value-i));
                }
            }
        }
    }

    public static boolean isPrime(int n) {
        if ((n % 2) == 0) {
            return false;
        }
        for (int i = 3; i < Math.sqrt(n); i += 2) {
            if ((n % i) == 0) {
                return false;
            }
        }
        return true;
    }
}