class Stack:

    def __init__(self):
        self.__lst = []

    def push(self, ele):
        self.__lst.append(ele)

    def pop(self):
        return self.__lst.pop()

    def is_empty(self):
        return len(self.__lst) == 0

    def get_stack(self):
        return self.__lst

0561fa97521e64a0f60ba90fab271eb77aafdbfb
class Stack:

    def __init__(self):
        self.__lst = []
    <mask token>
    <mask token>
    <mask token>

    def get_stack(self):
        return self.__lst

class Stack:

    def __init__(self):
        self.__lst = []
    <mask token>

    def pop(self):
        return self.__lst.pop()
    <mask token>

    def get_stack(self):
        return self.__lst

class Stack:

    def __init__(self):
        self.__lst = []
    <mask token>

    def pop(self):
        return self.__lst.pop()

    def is_empty(self):
        return len(self.__lst) == 0

    def get_stack(self):
        return self.__lst

class Stack:

    def __init__(self):
        self.__lst = []

    def push(self, ele):
        self.__lst.append(ele)

    def pop(self):
        return self.__lst.pop()

    def is_empty(self):
        return len(self.__lst) == 0

    def get_stack(self):
        return self.__lst
