//
//  A.swift
//  AtCoder
//
//  Created by NakaiKoheiSub on 2020/07/14.
//  Copyright © 2020 NakaiKoheiSub. All rights reserved.
//

import Foundation

func readInts() -> [Int] {
    return readLine()!.split(separator: " ").map { Int($0)! }
}
func main() {
    let As = readInts()
    if As.reduce(0){$0+$1} < 22{
        print("win")
    }else{
        print("bust")
    }
    
}
main()
