# Check that users have entered a valid
# option based on a list
def string_checker(user_response, valid_ans=('yes', 'no')):

    error = f"please enter a valid option from the following list: {valid_ans}"

    while True:

        # Get user response and make sure it's lowercase
        user_response = input(question).lower()

        for item in valid_ans:
            # check if the user response is a word in the list
            if item == user_response:
                return item

            # check if the user response is the same as
            # the first letter of an item in the list
            elif user_response == item[0]:
                return item

        # print error if user does not enter somthing that is valid
        print(error)
        print()


# Displays instructions
def instruction():
    print('''
    
**** Instructions ****

T''')