import java.util.*;

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();
    int ans = A1 + A2 + A3;
    if (ans < 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