    import java.io.*;
    public class Main{
      public static void main(String [] args) throws IOException{
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        String[] list = reader.readLine().split(" ");
        int sum = 0;
        for(String s:list){
          sum+= Integer.parseInt(s);}
        if(sum>=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