Given are three integers \(A_1, A_2, A_3\). If \(A_1 + A_2 + A_3\) is greater than or equal to 22, print \("bust"\); otherwise, print \("win"\).

Constraints

• \(1 ≤ A_i ≤13 (i=1,2,3)\)
• 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”.

Sample Input 1

5 7 9

Sample Output 1

win

Sample Input 2

13 7 2

Sample Output 2

bust