using System;

public class Program

{

    public static bool same(int [] a)

    {

        int sum1=0, sum2=0;

        for (int i=0; i<a.Length/2; i++)

            sum1+=a[i];

        for (int i=a.Length/2; i<a.Length; i++)

            sum2+=a[i];

        if (sum1==sum2)

            return true;

        else

            return false;

    }

    public static void Main()

    {

        int []a= new int [24];

        Random r1= new Random();

        for (int i=0; i<a.Length; i++)

            a[i]=r1.Next(20,41);

        bool b;

        b=same(a);

        if (b==true)

            Console.WriteLine("balanced");

        else

            Console.WriteLine("not balanced");

    }

    //-----------------------------------------

    //not balanced

}