import java.util.Scanner;

public class Main{
    public static void main(String[] args){
        // 入力
        Scanner sc = new Scanner(System.in);
        int A1 = sc.nextInt();
        int A2 = sc.nextInt();
        int A3 = sc.nextInt();
        sc.close();

        String r = "bust";
        if(A1+A2+A3<22){
            r = "win";
        }
        System.out.println(r);
    }
}
/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