#   File:  ChapterLists/login.py
"""  Asks your name if you are not in the list then "Sorry"
     else "Thank you". Asks 3 times.
     Login? john 
"""            
def main():
    L = ['ann,''dan','joe','liz']   # initialize list of users
    check = False
    for i in range(3):  #try 3 times
        x = input("Login?  ")    
        if ( x in L ):
             check = True
             break

    if ( check ):
        print("Thank you")
    else:
        print("Sorry. I do not know you")
        
        
main()