import java.io.BufferedReader; 
import java.io.IOException; 
import java.io.InputStreamReader; 
import java.util.StringTokenizer; 
  
class Main 
{ 
    public static void main(String[] args) throws IOException 
    { 
  
        BufferedReader br = new BufferedReader( 
                              new InputStreamReader(System.in)); 
  
        StringTokenizer st = new StringTokenizer(br.readLine()); 
        int a = Integer.parseInt(st.nextToken()); 
        int b = Integer.parseInt(st.nextToken()); 
        int c = Integer.parseInt(st.nextToken()); 
        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