      import java.util.Scanner;
         
        public class Main { //クラス名はMain
            public static void main(String[] args) {
                //コード
              Scanner sc = new Scanner(System.in);
        	  String n = sc.nextLine();
              String[] strArray = n.split(" ");
              int a = Integer.parseInt(strArray[0]);
              int b = Integer.parseInt(strArray[1]);
              int c = Integer.parseInt(strArray[2]);
              
              int wa = a + b + c;
              
              //判定
              if (wa >= 22) {
                System.out.println("bust");
              }else{
                 System.out.println("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