Given are three integers A_1, A_2, and A_3.

If A_1+A_2+A_3 is greater than or equal to 22, print `bust`; otherwise, print `win`.

Constraints

* 1 \leq A_i \leq 13 \ \ (i=1,2,3)
* All values in input are integers.

Input

Input is given from Standard Input in the following format:


A_1 A_2 A_3


Output

If A_1+A_2+A_3 is greater than or equal to 22, print `bust`; otherwise, print `win`.

Examples

Input

5 7 9


Output

win


Input

13 7 2


Output

bust
import java.util.*;
import java.math.*;

public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int sum = 0;
    for (int i = 0; i < 3; i++) sum += sc.nextInt();
    if (sum >= 22) System.out.println("bust");
    else System.out.println("win");
  }
}
