Structure RCList
  Value.i
  List A.RCList()
EndStructure

Procedure Flatten(List A.RCList())
  ResetList(A())
  While NextElement(A())
    With A()
      If \Value
        Continue
      Else
        ResetList(\A())
        While NextElement(\A())
          If \A()\Value: A()\Value=\A()\Value: EndIf
        Wend
      EndIf
      While ListSize(\A()): DeleteElement(\A()): Wend
      If Not \Value: DeleteElement(A()): EndIf
    EndWith
  Wend
EndProcedure