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

inputFormat

input are integers.

Input

Input is given from Standard Input in the following format:

A_1 A_2 A_3

outputFormat

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

样例

5 7 9

win