module AtCoder

(* Examples *)
(*
stdin.ReadLine()
printfn "%d"
printfn "%s"
*)

(* Library *)
module Library = ()

(* Standard Input *)
let readSplit elementFun=
  stdin.ReadLine().Split()
  |> Array.map elementFun

let read elementFun =
  stdin.ReadLine() |> elementFun

let readMap H =
  [|for i in 1..H -> stdin.ReadLine()|]
  |> Array.map(fun line ->
    line.ToCharArray()
  )
  |> array2D

(* Main *)
open Library

let n = 
  readSplit int
  |> Array.sum

(if n >= 22 then "bust" else "win") |> printfn "%s"