diff --git a/main.py b/main.py
index afd470f..7649c1e 100644
--- a/main.py
+++ b/main.py
@@ -11,3 +11,6 @@ def canidates(letters, min=2, max=5):
                 pos.append(word)
     return SPELL.known(pos)
 
+def filter_pos(pos, regex):
+    pat = re.compile(regex)
+    return list(filter(pat.match,pos))