diff --git a/examples/fwe/birdle/lib/main.dart b/examples/fwe/birdle/lib/main.dart
index 062a1c6a716..626dcee1895 100644
--- a/examples/fwe/birdle/lib/main.dart
+++ b/examples/fwe/birdle/lib/main.dart
@@ -69,20 +69,38 @@ class _GamePageState extends State<GamePage> {
 // #enddocregion GamePage
 
 // #docregion GuessInput
-class GuessInput extends StatelessWidget {
-  GuessInput({super.key, required this.onSubmitGuess});
+class GuessInput extends StatefulWidget {
+  const GuessInput({super.key, required this.onSubmitGuess});
 
   final void Function(String) onSubmitGuess;
 
+  @override
+  State<GuessInput> createState() => _GuessInputState();
+}
+
+class _GuessInputState extends State<GuessInput> {
   final TextEditingController _textEditingController = TextEditingController();
+
   final FocusNode _focusNode = FocusNode();
 
   void _onSubmit() {
-    onSubmitGuess(_textEditingController.text.trim());
-    _textEditingController.clear();
+    final text = _textEditingController.text.trim();
+
+    if (text.length == 5) {
+      widget.onSubmitGuess(text);
+      _textEditingController.clear();
+    }
+
     _focusNode.requestFocus();
   }
 
+  @override
+  void dispose() {
+    _textEditingController.dispose();
+    _focusNode.dispose();
+    super.dispose();
+  }
+
   @override
   Widget build(BuildContext context) {
     return Row(