# Check that the users have entered a valid
# option based on a list
def string_checker(question, valid_ans1):

    error = f"Please enter a valid option from the folowing list: {vaild_ans1}"

    while True:

        # Get user response and make sure it's lowercase
        user_response = input(question).lower()

        for item in valid_ans1:
            # check if the user response is a
            # word in the list
            if item == user_response:
                return item

            # check if the user response is the same as
            # the first letter of an itm in the list
            elif user_response == item[0]:
                return item
            else:
                print(error)



# Main routine goes here

rps_list = ["rock", "paper", "scissors"]

yes_no =["yes", "no"]

user_choice = string_checker("choose p , s, r: ",rps_list)

print(f"You chose: {user_choice}")