import java.util.Scanner;
public class LuckyNumber{
    public static void main(String [] args){
        System.out.println("Enter your ticket number:");
        Scanner in = new Scanner(System.in);
        int[] nums = new int[6];
        for(int i=0;i <nums.length; i++){
            nums[i]=in.nextInt();
        }

        if(nums[0]+ nums[1]+nums[2]== nums[3]+ nums[4]+nums[5]){
                System.out.println(" is lucky ");
        }
        else{
            System.out.println(" is unlucky ");
        }
    }
}