
//imports for BufferedReader
import java.io.BufferedReader;
import java.io.InputStreamReader;

//import for Scanner and other utility classes
import java.util.*;


// Warning: Printing unwanted or ill-formatted data to output will cause the test cases to fail

class Main {
    public static void main(String args[] ) throws Exception {
        Scanner s = new Scanner(System.in);
      
      int a=s.nextInt();
      int b=s.nextInt();
      int c=s.nextInt();
      
      if(a+b+c>=22)
        System.out.println("bust");
      else
        System.out.println("win");
    }
  
}
/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