--- a/progs/App4.js	Sun Sep 24 18:03:21 2017 +0100
+++ b/progs/App4.js	Mon Sep 25 17:16:56 2017 +0100
@@ -27,7 +27,7 @@
 }
 
 app.get('/', function(req, res){
-    var counter = gt_cookie(req.cookies.counter) || 0;
+    var counter = gt_cookie(req.cookies.counter || "") || 0;
     res.cookie('counter', mk_cookie(counter + 1));
     if (counter >= 5) {
         res.write('You are a valued customer ' +