import java.util.*;

public class Main {
    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);

        System.out.println(execute(sc.nextInt(),sc.nextInt(),sc.nextInt()));

    }

    public static String execute(int a1,int a2,int a3) {

        if(a1 + a2 + a3 <=21){
            return "win";
        }
        return "bust";
    }
}
/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