A, B, C = list(map(int,input().split()))

if A+B+C >= 22:

    print("bust")

else:

    print("win")

import sys

def input():

    return sys.stdin.readline()[:-1]

def main():

#    N = int(input())

    A, B, C = list(map(int,input().split()))

#    S = input()

    print(("bust" if (A+B+C) >= 22 else "win"))

if __name__ == '__main__':

    main()

A, B, C = list(map(int, input().split()))
if A + B + C >= 22:
    print("bust")
else:
    print("win")

import sys


def input():
    return sys.stdin.readline()[:-1]


def main():
    #    N = int(input())
    A, B, C = list(map(int, input().split()))
    #    S = input()
    print(("bust" if (A + B + C) >= 22 else "win"))


if __name__ == "__main__":
    main()

-A, B, C = list(map(int, input().split())) -if A + B + C >= 22: -    print("bust") -else: -    print("win") +import sys + + +def input(): +    return sys.stdin.readline()[:-1] + + +def main(): +    #    N = int(input()) +    A, B, C = list(map(int, input().split())) +    #    S = input() +    print(("bust" if (A + B + C) >= 22 else "win")) + + +if __name__ == "__main__": +    main()