diff --git a/Grille.php b/Grille.php
index 6b0e7a7..5845dab 100644
--- a/Grille.php
+++ b/Grille.php
@@ -171,7 +171,6 @@ class Grille implements ArrayAccess
                 $this->grille
             )
         );
-        var_dump($_SESSION);
     }
 
     public function load($id)
@@ -180,7 +179,6 @@ class Grille implements ArrayAccess
         session_start(["use_cookies" => false]);
 
         if (!isset($_SESSION["$this->largeur,$this->hauteur"])) {
-            var_dump($_SESSION);
             return false;
         }
 
diff --git a/Trie.php b/Trie.php
index 8a30a10..42ee6f8 100644
--- a/Trie.php
+++ b/Trie.php
@@ -5,8 +5,7 @@ class Trie implements ArrayAccess, IteratorAggregate, Countable {
     public array $branches = [];
     private $nb_branches = 0;
 
-    // ArrayAccess
-    public function offsetSet($cles, $valeur): void {
+    public function arraySet($cles, $valeur) {
         $this->nb_branches++;
         $cle = $cles[0];
         $cles = array_slice($cles, 1);
@@ -14,38 +13,38 @@ class Trie implements ArrayAccess, IteratorAggregate, Countable {
             $this->branches[$cle] = $valeur;
         } else {
             if (!isset($this->branches[$cle])) $this->branches[$cle] = new Trie();
-            $this->branches[$cle]->offsetSet($cles, $valeur);
+            $this->branches[$cle]->arraySet($cles, $valeur);
         }
     }
 
-    public function offsetExists($cles): bool {
+    public function arrayExists($cles) {
         $cle = $cles[0];
         $cles = array_slice($cles, 1);
         if ($cles == []) {
             return isset($this->branches[$cle]);
         } else {
-            return isset($this->branches[$cle]) && $this->branches[$cle]->offsetExists($cles);
+            return isset($this->branches[$cle]) && $this->branches[$cle]->arrayExists($cles);
         }
     }
 
-    public function &offsetGet($cles): mixed {
+    public function &arrayGet($cles) {
         $cle = $cles[0];
         $cles = array_slice($cles, 1);
         if ($cles == []) {
             return $this->branches[$cle];
         } else {
-            return $this->branches[$cle]->offsetGet($cles);
+            return $this->branches[$cle]->arrayGet($cles);
         }
     }
 
-    public function offsetUnset($cles): void {
+    public function arrayUnset($cles) {
         $cle = $cles[0];
         $cles = array_slice($cles, 1);
         if ($cles == []) {
             unset($this->branches[$cle]);
             $this->nb_branches--;
         } else {
-            $this->branches[$cle]->offsetUnset($cles);
+            $this->branches[$cle]->arrayUnset($cles);
             $this->nb_branches--;
             if (count($this->branches[$cle]) == 0) {
                 unset($this->branches[$cle]);
@@ -53,11 +52,10 @@ class Trie implements ArrayAccess, IteratorAggregate, Countable {
         }
     }
 
-    // IteratorAggregate
-    public function getIterator(): Traversable {
+    public function arrayIterator() {
         foreach ($this->branches as $cle => $branche) {
             if ($branche instanceof Trie) {
-                foreach($branche as $sous_cles => $feuille) {
+                foreach($branche->arrayIterator() as $sous_cles => $feuille) {
                     yield array_merge([$cle], $sous_cles) => $feuille;
                 }
             } else {
@@ -66,6 +64,30 @@ class Trie implements ArrayAccess, IteratorAggregate, Countable {
         }
     }
 
+    // ArrayAccess
+    public function offsetSet($string, $valeur): void {
+        $this->arraySet(str_split($string), $valeur);
+    }
+
+    public function offsetExists($string): bool {
+        return $this->arrayExists(str_split($string));
+    }
+
+    public function &offsetGet($string): mixed {
+        return $this->arrayGet(str_split($string));
+    }
+
+    public function offsetUnset($string): void {
+        $this->arrayUnset(str_split($string));
+    }
+
+    // IteratorAggregate
+    public function getIterator(): Traversable {
+        foreach($this->arrayIterator() as $array => $valeur) {
+            yield implode("", $array) => $valeur;
+        }
+    }
+
     // Countable
     public function count(): int {
         return $this->nb_branches;
diff --git a/dico.php b/dico.php
index 83a6a3e..113f14e 100644
--- a/dico.php
+++ b/dico.php
@@ -31,8 +31,8 @@ function dico($longueur_max) {
                 break;
             }
 
-            $mot = str_split(strtoupper($mot));
-            $longueur = count($mot);
+            $mot = strtoupper($mot);
+            $longueur = strlen($mot);
             if (!isset($dico[$longueur])) $dico[$longueur] = new Trie();
             if (!isset($dico[$longueur][$mot])) $dico[$longueur][$mot] = [];
             if (strlen($definition)) $dico[$longueur][$mot][] = $definition;
@@ -50,9 +50,9 @@ function mots_espaces($longueur_max) {
     for ($longueur = 1; $longueur <= $longueur_max; $longueur++) {
         for ($position_espace = MIN_PREMIER_MOT; $position_espace + MIN_MOTS_SUIVANTS < $longueur; $position_espace++) {
             $mots_suivants = $dico[$longueur - $position_espace - 1];
-            foreach ($dico[$position_espace] as $premier_mot => $definition) {
+            foreach ($dico[$position_espace]->arrayIterator() as $premier_mot => $definition) {
                 $premier_mot[] = " ";
-                $dico[$longueur][$premier_mot] = $mots_suivants;
+                $dico[$longueur]->arraySet($premier_mot, $mots_suivants);
             }
         }
     }
diff --git a/index.php b/index.php
index f8f6c09..e570c88 100644
--- a/index.php
+++ b/index.php
@@ -1,5 +1,4 @@
 <?php
-include_once "dico.php";
 include_once "Grille.php";
 
 
@@ -49,7 +48,7 @@ if ($grille_valide) {
     for ($y = 0; $y < $hauteur; $y++) {
         $definitions_horizontales[$y] = [];
         foreach ($grille->lignes[$y] as $mot) {
-            $definitions = $grille->dico[strlen($mot)][str_split($mot)];
+            $definitions = $grille->dico[strlen($mot)][$mot];
             if (count($definitions)) {
                 $definitions_horizontales[$y][] = $definitions[mt_rand(0, count($definitions) - 1)];
             }
@@ -59,7 +58,7 @@ if ($grille_valide) {
     for ($x = 0 ; $x < $largeur; $x++) {
         $definitions_verticales[$x] = [];
         foreach ($grille->colonnes[$x] as $mot) {
-            $definitions = $grille->dico[strlen($mot)][str_split($mot)];
+            $definitions = $grille->dico[strlen($mot)][$mot];
             if (count($definitions)) {
                 $definitions_verticales[$x][] = $definitions[mt_rand(0, count($definitions) - 1)];
             }