Update app.py

app.py

@@ -56,12 +56,16 @@ def paste_story():
     story = st.text_area("Paste your story here")
     if st.button("Build Word List"):
         words = [word.upper() for word in story.split() if len(word) > 4]
+        with open(WORDS_FILE, "r") as f:
+            existing_words = set(f.read().split("\n"))
+        words = list(set(words) - existing_words)
         words = sorted(words, key=len, reverse=True)[:10]
         save_word_list(words)
         board = generate_board(words)
         display_word_list(words)
         display_board(board)
 
+
 words = load_word_list()
 display_word_list(words)
 paste_story()