import java.util.Scanner;

public class Test extends Object{
    public static void main(String[] args) {
        Scanner sc=new Scanner(System.in);
        try{
            int n=sc.nextInt();
            checkIfEqualsFive(n);
        }
        catch(IllegalArgumentException e){
            System.out.println(e);
        }
        sc.close();
    }

    public static void checkIfEqualsFive(int number) {
        if (number != 5) {
            throw new IllegalArgumentException("number must be five");
       }
    }
}

import java.util.Scanner;

public class Test extends Object{
    public static void main(String[] args) {
        Scanner sc=new Scanner(System.in);
        try{
            int n=sc.nextInt();
            checkIfEqualsFive(n);
        }
        catch(IllegalArgumentException e){
            System.out.println(e);
        }
        sc.close();
    }

    public static void checkIfEqualsFive(int number) {
        if (number != 5) {
            throw new IllegalArgumentException("number must be five");
       }
    }
}

import java.util.Scanner;

public class Test extends Object{
    public static void main(String[] args) {
        Scanner sc=new Scanner(System.in);
        int n=sc.nextInt();
        checkIfEqualsFive(n);
        sc.close();
    }

    public static void checkIfEqualsFive(int number) {
        if (number != 5) {
            throw new IllegalArgumentException("number must be five");
       }
    }
}

import java.util.Scanner;

public class Test extends Object{
    public static void main(String[] args) {
        Scanner sc=new Scanner(System.in);
        int n=sc.nextInt();
        checkIfEqualsFive(n);
        sc.close();
    }

    public static void checkIfEqualsFive(int number) {
        if (number != 5) {
            throw new IllegalArgumentException("number must be five");
       }
    }
}