import java.util.Scanner;

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