import java.util.*;
 
public class Main {
    public static void main (String[] args) {
        //Scanner in = new Scanner(System.in);
        Scanner scanner = new Scanner(System.in);
        StringBuilder sb = new StringBuilder();

        String NString = scanner.nextLine();
        String[] arr = NString.split(" ");
        int  a = Integer.valueOf(arr[0]);
        int  b = Integer.valueOf(arr[1]);
        int  c = Integer.valueOf(arr[2]);

        sb.append((a + b + c) < 22 ? "win" : "bust");
        System.out.println(sb);
    }
}
/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