Imports System

Public Class Program

    Public Shared Sub Main(args As String())
        Dim Input() As Integer = Array.ConvertAll(Of String, Integer)(Console.ReadLine.Split(" "), AddressOf Integer.Parse)
        If Input(0) + Input(1) + Input(2) >= 22 Then
            Console.WriteLine("bust")
        Else
            Console.WriteLine("win")
        End If

    End Sub
End Class