# Functions
def make_statement(statement, decoration):
    """Emphasises headings by adding decoration at the start and end"""

    print(f"{decoration * 3} {statement} {decoration * 3}")


def string_check(question, valid_answers=('yes', 'no'),
                 num_letters=1):
    """Checks that users 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_answers:

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

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

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


def instructions():
    make_statement("Instructions", "ℹ️")

    print('''

For each Customer enter ...
- Their name
- Their age
- The payment method (cash / credit)

The program will record the burgers chosen and calculate the
order cost, and surcharge.

Once you have either bought 5 burgers or entered the 
exit code ('xxx'), the program will display the order 
information and write the data to a text file (receipt).

        ''')


# Main routine goes here

make_statement("Bun Bro's", "🍔")

print()
want_instructions = string_check("Do you want to see the instructions? ")

if want_instructions == "yes":
    instructions()

print()
print("Program continues...")