using System;

public class Program

{

    public static void Main()

    {

        int cek;

        for (int i=0; i < 30;i=i+1)

        {   

            cek = i % 2;

            if (cek == 1)

            {

                Console.WriteLine(i+" putih");

            }

            else if(cek == 0)

            {

                Console.WriteLine(i+" hitam");

            }

        }

    }

}