fix(cxumol): correct 5-1 checker, closing #10 (#11)

* correct 5-1 checker

* improve 5-1 logic

* Update checker 5-1

llmriddles/questions/level5.py

@@ -47,7 +47,11 @@ def _checker_1(question_text: str, user_text: str, answer_text: str, lang: str):
     if count_words(user_text) < 10:
         return False, "用户的问题长度应该至少10个字" if lang == 'cn' else 'Question should be no less than 10 words.'
 
-    if answer_text == user_text:
+    if lang == 'en':
+        answer_text = answer_text.split()
+        user_text = user_text.split()
+    
+    if not any(each in answer_text for each in user_text):
         return True, None
     else:
         return False, None