Python Help

import collections

def is_valid_word(word, starting_word):
    # Check if the word is long enough
    if len(word) < 3:
        return False

    # Check if the word is made up of only letters in the starting word
    letter_counts = collections.Counter(word)
    for letter, count in letter_counts.items():
        if letter not in starting_word or starting_word.count(letter) < count:
            return False

    return True

def get_word_from_user(n):
    word = input(f"Enter a word with at least {n} characters: ")
    # Convert the word to lowercase to handle case-insensitive input
    return word.lower()

def play_wordbuilder():
    starting_word = get_word_from_user(6)

    score = 0
    used_words = []
    while True:
        word = get_word_from_user(3)
        if is_valid_word(word, starting_word):
            if word in used_words:
                print("You have already entered this word. Please enter a new word.")
            else:
                used_words.append(word)
                score += 1
        else:
            print("Invalid word. Please try again.")

        print(f"Your current score is {score}.")

play_wordbuilder()