import java.util.Scanner;
import java.util.Arrays;

public class Main {
    public static void main(String[] args) {
        //Scanner
        Scanner sc = new Scanner(System.in);

        int num1 = sc.nextInt();
        int num2 = sc.nextInt();
        int num3 = sc.nextInt();

        if(num1 + num2 + num3 >= 22) {
            System.out.print("bust");
        } else {
            System.out.print("win");
        }


    }
}
/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