diff --git a/src/Tree.java b/src/Tree.java
index d1c6644..bd84d5c 100644
--- a/src/Tree.java
+++ b/src/Tree.java
@@ -9,7 +9,6 @@ public class Tree {
     Tree (String exp){
         this.exp = exp;
         root = tree(0);
-        display();
         findPatern(root);
     }
 
@@ -83,6 +82,11 @@ public class Tree {
 
                         Node notlc = new Node(null,lc,null,'!', lc.getLvl() +1);
                         Node notrc = new Node(null,rc,null,'!', rc.getLvl() +1);
+
+                        notlc.setPos(1);
+                        notrc.setPos(2);
+                        rc.setPos(1);
+
                         lc.setFather(notlc);
                         rc.setFather(notrc);
 
@@ -100,6 +104,10 @@ public class Tree {
                         lc_2.setFather(notlc_2);
                         rc_2.setFather(notrc_2);
 
+                        notlc_2.setPos(1);
+                        notrc_2.setPos(2);
+                        rc_2.setPos(1);
+
                         Node greatfather_2 = new Node(father.getFather(),notlc_2,notrc_2,'|',notlc_2.getLvl() + notrc_2.getLvl() +1);
                         notlc_2.setFather(greatfather_2);
                         notrc_2.setFather(greatfather_2);
@@ -112,6 +120,9 @@ public class Tree {
                         Node notrc_3 = new Node(null,rc_3,null,'!', rc_3.getLvl() +1);
                         rc_3.setFather(notrc_3);
 
+                        notrc_3.setPos(2);
+                        rc_3.setPos(1);
+
                         Node greatfather_3 = new Node(father.getFather(),lc_3,notrc_3,'&',lc_3.getLvl() + notrc_3.getLvl() +1);
                         lc_3.setFather(greatfather_3);
                         notrc_3.setFather(greatfather_3);
@@ -125,7 +136,7 @@ public class Tree {
             case '>' :
                 Node notlc = new Node(null,leftChild,null,'!', leftChild.getLvl() +1);
                 leftChild.setFather(notlc);
-
+                notlc.setPos(1);
                 Node greatfather = new Node(father.getFather(),notlc,rightChild,'|',notlc.getLvl() + rightChild.getLvl() +1);
                 notlc.setFather(greatfather);
                 rightChild.setFather(greatfather);
@@ -141,12 +152,15 @@ public class Tree {
         if (father.getPos() == 1) {
             father.getFather().setLeftChild(greatFather);
             greatFather.setFather(father);
+            greatFather.setPos(1);
         } else if (father.getPos() == 2) {
             father.getFather().setRigthChild(greatFather);
             greatFather.setFather(father);
+            greatFather.setPos(2);
         } else {
             root = greatFather;
             greatFather.setFather(null);
+            greatFather.setPos(0);
         }
     }
 }
\ No newline at end of file