class one:
    def func1(self):
        print("this is first function")
class two(one):
    def func2(self):
        print("this is secont function")
class three(two):
    def func3(self):
        print("this is third function")
class four(three):
    def func4(self):
        print("this is fourth function")
ob=four()
print(ob.func1())
print(ob.func2())
print(ob.func3())

903f21d1404872c346e42dbae7dc6b402a13a764
<mask token>


class three(two):
    <mask token>


class four(three):

    def func4(self):
        print('this is fourth function')


<mask token>

<mask token>


class two(one):

    def func2(self):
        print('this is secont function')


class three(two):

    def func3(self):
        print('this is third function')


class four(three):

    def func4(self):
        print('this is fourth function')


<mask token>

class one:

    def func1(self):
        print('this is first function')


class two(one):

    def func2(self):
        print('this is secont function')


class three(two):

    def func3(self):
        print('this is third function')


class four(three):

    def func4(self):
        print('this is fourth function')


<mask token>

class one:

    def func1(self):
        print('this is first function')


class two(one):

    def func2(self):
        print('this is secont function')


class three(two):

    def func3(self):
        print('this is third function')


class four(three):

    def func4(self):
        print('this is fourth function')


ob = four()
print(ob.func1())
print(ob.func2())
print(ob.func3())

class one:
    def func1(self):
        print("this is first function")
class two(one):
    def func2(self):
        print("this is secont function")
class three(two):
    def func3(self):
        print("this is third function")
class four(three):
    def func4(self):
        print("this is fourth function")
ob=four()
print(ob.func1())
print(ob.func2())
print(ob.func3())
