#Functions go here
def string_check(question, valid_ans_list, num_letters):
    """Checks that user enter the full word
    or the 'n' letter/s of a word from a list of valid responses"""

    while True:

        response= input(question).lower()

        for item in valid_ans_list:

            # checks if the response is the entire word
            if response == item:
                return item

            # check if it's the first letter
            elif response == item[:num_letters]:
                return item


        print(f"Please choose an option from {valid_ans_list}")

# Main routine goes here
payment_list = ['cash', 'credit']
yes_no_list = ['yes', 'no']

like_coffee = string_check("Do you like coffee? ", yes_no_list,1)
print(f"You chose ({like_coffee})")
choose_payment = string_check("Choose a payment option: ", payment_list, 2)
print(f"You choose ({choose_payment})")