Imports System
Public Class Test
Public Shared Sub Main()
Dim sCode = "051056062060069068069079"
Dim i As Integer
Dim sDec As String = ""
Dim sDecode
For i = 1 To Len(sCode) Step 3
sDec = sDec & Chr(Val(Mid(sCode, i, 3)) - i)
Next
sDecode = sDec
Console.WriteLine(sDecode)
End Sub
End Class
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