Hsieh

1. Private Sub Worksheet_Change(ByVal Target As Range)
   
2. If Intersect(Target, [J4:L4]) Is Nothing Then Exit Sub
   
3. a = Array("U2", "U1", "S1", "S2")
   
4. b = Array(0, 0, -127, -32767)
   
5. c = Array(65535, 255, 127, 32767)
   
6. k = Application.Match([J4], a, 0) - 1
   
7. [M4] = Application.Max([K4], b(k)) & "~" & Application.Min([L4], c(k))
   
8. End Sub

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