class C1:
  def setX(self, x):
        self.x = x
class C2(C1):
    def setY(self, y):
        self.y = y
class C4(C2):
    def setZ(self, z):
        self.z = z
class C5(C2):
    def setW(self, w):
        self.w = w
class C3(C5):
    def setNume(self, nume):
        self.nume = nume