import java.io.*;

public class Main {
	public static void main(String[] args) throws IOException {
try (BufferedReader in = new BufferedReader(new InputStreamReader(System.in))) {
String line = in.readLine();
String[] params = line.split(" ");
int a1 = Integer.parseInt(params[0]);
int a2 = Integer.parseInt(params[1]);
int a3 = Integer.parseInt(params[2]);

int sum = a1 + a2 + a3;
if (sum >= 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