import java.util.*;
class leadnumber
{
    public static void main(String args[])
    {
     Scanner sc = new Scanner (System.in);
     int n = sc.nextInt();
     int sum_even=0,sum_odd=0;
     while (n>0)
     {
         int d = n % 10;
         if(d%2==0)
         {
             sum_even=sum_even+d;
         }
         else
         {
           sum_odd=sum_odd+d;   
         }
         n=n/10;
     }
     if(sum_even==sum_odd)
     {
         System.out.println("It is a lead number");
     }
     else
     {
         System.out.println("It is not a lead number");
     }
   }
}