Try this approach. Type the sheet names all in CAPS in the sub
Sub delshts()
Application.DisplayAlerts = False
For Each sh In Worksheets
Select Case UCase(sh.Name)
Case "AAA", "B B", "FS": x = 1
Case Else
End Select
'If x < 1 Then MsgBox sh.Name' testing
If x < 1 Then MsgBox sh.Delete
Next sh
Application.DisplayAlerts = True
End Sub