public class CHChemie {
class Aliphaten {}
class Alkane extends Aliphaten {}
class Alkene extends Aliphaten {}
class Alkine extends Aliphaten {}
class Methan extends Alkane {}
class Ethan extends Alkane {}
class Propan extends Alkane {}
class Butan extends Alkane {}
class Pentan extends Alkane {}
class Hexan extends Alkane {}
class Heptan extends Alkane {}
class Oktan extends Alkane {}
class Ethen extends Alkene {}
class Propen extends Alkene {}
class Buten extends Alkene {}
class Penten extends Alkene {}
class Hexen extends Alkene {}
class Hepten extends Alkene {}
class Okten extends Alkene {}
class Ethin extends Alkine {}
class Propin extends Alkine {}
class Butin extends Alkine {}
class Pentin extends Alkine {}
class Hexin extends Alkine {}
class Heptin extends Alkine {}
class Oktin extends Alkine {}
}