p02835 AtCoder Beginner Contest 147 - Blackjack
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
```python
print('bwuisnt'[sum(map(int,input().split()))<22::2])
```