def ck_no():
    """
    Ask for user input of a valid number and repeat the
    question, if the user enters a number, which is not
    allowed or an invalid number.
 
    Allowed numbers: 2, 3, 4
 
    Return value of the valid answer

def ck_no(prompt):
    while True:
        try:
            
            lst = (2,3,4)
            if prompt not in lst:
                print("not in list")
                raise ValueError
            else:
                print("In the List")
        except ValueError as e:
            print(e)
            return
            
ck_no(int(input(print("Enter