import java.util.Scanner;

class Main
{
 public static void main(String x[])
 {
  Scanner sc= new Scanner(System.in);
  int a[]= new int[3];
  for(int i=0;i<3;i++)
    a[i]=sc.nextInt();
  int sum=a[0]+a[1]+a[2];
  if(sum<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