import java.util.Scanner;
 
public class Ex5 {
	public static void main(String [] args) {
		Scanner kb = new Scanner(System.in);
		System.out.print("? ");
		int num = kb.nextInt();
 
		if (isDivisibleBy7(num)) // call isDivisibleBy7() with num as argument
			System.out.println(num + " is divisible by 7");
		else
			System.out.println(num + " is not divisible by 7");
	}
 
	public static boolean isDivisibleBy7(int num) {
		return num %7 == 0;
	}
}