import java.util.*;
 
public class Main{
  public static void main (String args[]){
    Scanner sc = new Scanner(System.in);
    int numA = sc.nextInt();
    int numB = sc.nextInt();
    int numC = sc.nextInt();
    
    int sum = numA + numB + numC;
    
    String res = "win";
    
    if (sum > 21){
      res = "bust";
    }
    
    System.out.println(res);
    
  }
}
/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