import java.io.*;

class AllEvenNum{
	public static void main(String[] args) {
		try{
			BufferedReader br1 = new BufferedReader(new InputStreamReader(System.in));
			System.out.println("Enter number : ");
			int num = Integer.parseInt(br1.readLine());
			System.out.println("Even Numbers:");
			for (int i=1;i <=num ; i++){
				if(i%2==0 ){
					System.out.print(i+",");
				}
			}
		}
		catch(Exception e){}
		
	}
}