import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner scan = new Scanner(System.in);
        
        int A1= scan.nextInt();
        int A2 = scan.nextInt();
        int A3 = scan.nextInt();
        
        if (A1 + A2 + A3 < 22) {
            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