s = "python": b = 0
For i = 1 To Len(s) - 1
a = Abs(Asc(Mid(s, i, 1)) - Asc(Mid(s, i + 1, 1)))
If a > b Then b = a
Next i
Label1.Caption = Str(b)
执行该程序段后,标签Label1上显示的内容是( )
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