import java.util.Scanner;
public class Main
{
public  static  void main(String args[])
{
Scanner inp= new Scanner(System.in);
int a=inp.nextInt();
    int b=inp.nextInt();
    int c=inp.nextInt();
    if((a+b+c)<22)
    {
        System.out.println("win");
    }
    else if((a+b+c)>=22)
    {
        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