# Check that the users entered a valid
# option based on a list


def string_checker(question, valid_ans=("yes", "no")):
    while True:


        user_response = input(question).lower()

        for item in valid_ans:
            if item == user_response:
                return item

            elif user_response == item[0]:
                return item


# Main routine goes here

yes_no = ["yes", "no"]
rps_list = ["rock", "paper", "scissors", "xxx"]

want_instructions = string_checker("Do you want to see the instructions? ",
                                   yes_no)

print("You chose: ", want_instructions)

user_choice = string_checker( "Choose: ", rps_list)
print("You chose: ", user_choice)