EnableExplicit

Procedure.s CommaQuibble(Input$)
  Protected i, count
  Protected result$, word$
  Input$ = RemoveString(Input$, "[")
  Input$ = RemoveString(Input$, "]")
  Input$ = RemoveString(Input$, #DQUOTE$)
  count = CountString(Input$, ",") + 1
  result$ = "{"
  For i = 1 To count
    word$ = StringField(Input$, i, ",")
    If i = 1
      result$ + word$
    ElseIf Count = i
      result$ + " and " + word$
    Else
      result$ + ", " + word$
    EndIf
  Next
  ProcedureReturn result$ + "}"
EndProcedure

If OpenConsole()
  ; As 3 of the strings contain embedded quotes these need to be escaped with '\' and the whole string preceded by '~'
  PrintN(CommaQuibble("[]"))
  PrintN(CommaQuibble(~"[\"ABC\"]"))
  PrintN(CommaQuibble(~"[\"ABC\",\"DEF\"]"))
  PrintN(CommaQuibble(~"[\"ABC\",\"DEF\",\"G\",\"H\"]"))
  PrintN("")
  PrintN("Press any key to close the console")
  Repeat: Delay(10) : Until Inkey() <> ""
  CloseConsole()
EndIf