diff --git a/typescript b/typescript
index 990f669..551bed0 100644
--- a/typescript
+++ b/typescript
@@ -1,38 +1,41 @@
-bash-4.2$ ./mailbox 3
-3 1
-4 2
-6 1
-5 1
-7 3
-9 2
-
-The result from thread 3 is 7 from 1 operations during 2 secs.
-The result from thread 2 is 13 from 2 operations during 2 secs.
-The result from thread 1 is 14 from 3 operations during 3 secs.
-bash-4.2$ ./mailbox 3 nb
-3 1
-4 2
-6 1
-5 1
-7 3
-9 2
-
-The result from thread 3 is 7 from 1 operations during 1 secs.
-The result from thread 2 is 13 from 2 operations during 2 secs.
-The result from thread 1 is 14 from 3 operations during 3 secs.
-bash-4.2$ ./mailbox 5
-6 4
-
-The result from thread 1 is 0 from 0 operations during 0 secs.
-The result from thread 2 is 0 from 0 operations during 0 secs.
+-bash-4.2$ ./mailbox 4
+0 2
+5 2
+-1 2
+Invalid value.
+7 0
+Invalid recipient id.
+7 5
+Invalid recipient id.
+10 4
+7 1
+2 1
+3 2
+The result from thread 1 is 9 from 2 operations during 2 secs.
+The result from thread 3 is 0 from 0 operations during 2 secs.
+The result from thread 4 is 10 from 1 operations during 2 secs.
+The result from thread 2 is 8 from 3 operations during 3 secs.
+-bash-4.2$ ./mailbox 4 nb
+0 2
+5 2
+-1 2
+Invalid value.
+7 0
+Invalid recipient id.
+7 5
+Invalid recipient id.
+10 4
+7 1
+2 1
+3 2
 The result from thread 3 is 0 from 0 operations during 0 secs.
-The result from thread 5 is 0 from 0 operations during 0 secs.
-The result from thread 4 is 6 from 1 operations during 1 secs.
-bash-4.2$ ./mailbox 5 nb
+The result from thread 4 is 10 from 1 operations during 1 secs.
+The result from thread 1 is 9 from 2 operations during 2 secs.
+The result from thread 2 is 8 from 3 operations during 3 secs.
+-bash-4.2$ ./mailbox 4
 6 4
-
+a 5
 The result from thread 2 is 0 from 0 operations during 0 secs.
-The result from thread 5 is 0 from 0 operations during 0 secs.
 The result from thread 1 is 0 from 0 operations during 0 secs.
 The result from thread 3 is 0 from 0 operations during 0 secs.
 The result from thread 4 is 6 from 1 operations during 1 secs.