class Grandparent:
    gparentname = ""
    def show_gparent(self):
        print("GrandParent:",self.gparentname)


class Father(Grandparent):
    fathername = ""
    def show_father(self):
        print("Father:",self.fathername)


class Mother(Grandparent):
    mothername = ""
    def show_mother(self):
        print("Mother:",self.mothername)



g = Grandparent()
g.gparentname = "Tom"
f = Father()
f.fathername = "Mark"
m = Mother()
m.mothername = "Lily"

g.show_gparent()
f.show_father()
m.show_mother()

# Coded by Saahil