Imports System.Collections.Generic
Imports System.Console

Module Program
    Sub Main()
        Dim a As Integer = NextInt()
        Dim b As Integer = NextInt()

        WriteLine(New String() {"Negative", "Zero", "Positive"}(Calc(a, b) + 1))
    End Sub

    Function Calc(a As Integer, b As Integer) As Integer
        If a <= 0 AndAlso 0 <= b Then
            Return 0
        ElseIf a > 0 Or (b - a) Mod 2 <> 0 Then
            Return 1
        Else
            Return -1
        End If
    End Function

    Function NextInt() As Integer
        Return CInt(NextString())
    End Function

    Function NextString() As String
        Dim result As New List(Of Char)
        Do
            Dim tmp As Integer = Read()
            If tmp < 0 Then Exit Do
            Dim nextChar As Char = Chr(tmp)

            If Not Char.IsWhiteSpace(nextChar) Then
                result.Add(nextChar)
            ElseIf nextChar <> vbCr Then
                Exit Do
            End If
        Loop
        Return New String(result.ToArray())
    End Function

End Module
