diff --git a/4a1s/MFES/PL - Aula 5.md b/4a1s/MFES/PL - Aula 5.md
index 768fb94..41d3174 100644
--- a/4a1s/MFES/PL - Aula 5.md	
+++ b/4a1s/MFES/PL - Aula 5.md	
@@ -45,13 +45,15 @@ pred Invs {
   	//no node links to nodes associated with a different hash
   	all x, y: Node | x.key.hash != y.key.hash implies (x.prox != y and y.prox != x)
   	
+
+
+  	//MAY BE WORNG STUFF
   	//the head of a bucket may be empty
   	all x: Bucket, y : Node | x.head = y or not x.head = y
   
   	//the prox node of another node may be empty
   	all x: Node, y : Node | x.prox = y or not x.prox = y
 
-
   	//WORNG STUFF
   	//buckets may only have one head exclusive to it
   	all x, y : Bucket| all z : Node | x.head = z implies y.head != z