diff --git a/todo.md b/todo.md
index 5069d50..fc88d1d 100644
--- a/todo.md
+++ b/todo.md
@@ -1,5 +1,6 @@
 # Todo
 - scheduled tasks -> ticker/gocron ?
-- add filter types
+- change filter types
   - regex -> regex replace
-  - regex extract (with groups?)
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+  - regex extract (with groups?)
+  - substring ":4" "28:" "-100:"
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