diff --git a/ch1/echo3.go b/ch1/echo3.go
index 5b2d310..27040fb 100644
--- a/ch1/echo3.go
+++ b/ch1/echo3.go
@@ -9,4 +9,5 @@ import (
 
 func main() {
 	fmt.Println(strings.Join(os.Args[1:], "|"))
+	fmt.Println(os.Args[1:])
 }