diff --git a/app/user_service.py b/app/user_service.py
index 24e8998..e66857c 100644
--- a/app/user_service.py
+++ b/app/user_service.py
@@ -180,7 +180,7 @@ def user_mark_word(username):
         lst = []
         lst2 = []
         for word in request.form.getlist('marked'):
-            if not word in pickle_idea2.exclusion_lst:
+            if not word in pickle_idea2.exclusion_lst and len(word) > 2:
                 lst.append((word, [get_time()]))
                 lst2.append(word)
         d = pickle_idea2.merge_frequency(lst, lst_history)