# functions go here

def yes_no(question):
    """check the user says yes / no / y / n (y/n), returns 'yes' or 'no' """

    while True:

        response = input(question).lower()

       # check the user says yes / no / y / n
        if response == "yes" or response == "y" :
            return "yes"
        elif response == "no" or response == "n" :
           return "no"
        else:
            print("please enter yes / no")


def instructions():
    """Prints instructions"""

    print("""
*** Instructions ****

Roll the dice and try to win!
    """)



# Main routine

# ask the user if they want instructions (check they say yes / no)
    want_instructions =yes_no("Do you want to see the instructions")

# Display the instructions if the user wants to see them...
if want_instructions == "yes":
    instructions()

print()
print("program continues")