import java.util.Scanner;

class Main{
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int total = 0;
 for(int i = 0; i < 3;i++) {
	   total  = total + Integer.parseInt(sc.next());
 }
if(total <= 21) {
	System.out.println("win");
}else {
	System.out.println("bust");
}
        
        
       
        }
 
     
    }
/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