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Language/Type: VB if/else mod mystery

For each call to the following function, indicate what output is produced.

Public Sub Mystery2(a As Integer, b As Integer)
    If a Mod b = 0
        a = a \ b
        If a < b
            b = b - a
        End If
    ElseIf b Mod 2 = 0
        b = b \ 2
        a = a - b
    End If
    Console.WriteLine(a & " " & b)
End Sub
Mystery2(20, 4)
Mystery2(7, 6)
Mystery2(14, 7)
Mystery2(24, 8)
Mystery2(13, 9)

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