# -*- coding: utf-8 -*-
"""
Created on Mon Sep 21 13:34:38 2020

@author: dell
"""


# -*- coding: utf-8 -*-
"""
Created on Mon Sep 21 13:34:38 2020

@author: dell
"""


# -*- coding: utf-8 -*- Created on Mon Sep 21 13:34:38 2020
 
 @author: dell