

import java.util.Scanner;

public class Main {

    public static void main(String[] args) {

        Scanner input = new Scanner(System.in);
        int A1 = 0, A2 = 0, A3 = 0,result=0;
        A1 = input.nextInt();
        A2 = input.nextInt();
        A3 = input.nextInt();
        
        if (1 <= A1 && A1 <= 13 && 1 <= A2 && A2 <= 13 && 1 <= A3 && A3 <= 13 ) {   
            if(A1+A2+A3==22 || A1+A2+A3>22){
                System.out.println("bust");
            }
            else{
                System.out.println("win");
            }       

        }
        else{
           
        }

    }
}

/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz