# Functions go here
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_ans_list=('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_ans_list:

            # check 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}")


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

    print('''

For each buyer enter:
-Name
-Budget

This program displays a range of pokemon cards users can purchase
within their budget. They can choose how many cards they want, the best value for 
their budget and then finally purchase.

Users can buy multiple cards or can enter (xxx) to leave the code.

It will finally show an itemised list of what users chose to purchase


    ''')


# Main Routine goes here

make_statement("Instructions", "ℹ")

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

if want_instructions == "yes":
    instructions()

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